Mix of pigment scales oriented by magnetic field and not oriented by magnetic field and applied as coat on substrate

FIELD: physics, optics.

SUBSTANCE: mix comprises first set of pigment scales oriented by magnetic field. Said scales can vary their colour from first to second colour at first change of the angle of vision. Second set of pigment scales not oriented by magnetic field that can vary their colour from said first to third colour at second change of the angle of vision other than the first one. Note here that said first, second and third colours are different colours. Scales of said first and second sets are applied on substrate in binder that makes the mix of scales. Note also that said scales have said first colour if seen on substrate at direct angle. Note also that scales oriented by magnetic field are oriented, in fact, in similar way differing from orientation of scales not oriented by magnetic field so that substrate inclination relative to first axis causes the change in seen colour from said first to said second colour. Substrate inclination relative to second axis perpendicular to first axis causes the change of colour from first colour to said third colour.

EFFECT: coat colouration changing.

8 cl, 10 dwg

 

The technical field to which the invention relates

This invention relates to color-changing pigment and coatings, in particular to that type which is used on banknotes, labels, securities and documents that are required to obtain an attractive protective coating or changing the color of the coating.

The level of technology

Covering, color-changing, are well known and are found on some banknotes and banknotes USA many other countries. Although the resulting printed or affixed at a high temperature diffraction patterns have the ability to change color and are sometimes considered Zlatopramen, the present invention relates generally to a color change, which is caused by interference effects from thin films; i.e. due to the multilayer thin-film coatings having a reflector, the separator and the absorber or the sequence of interference layers. U.S. patent 6236510, 5570847 and 5279657 are some examples of patents on the name of Roger Phillips describing thin-film interference scales. In U.S. patents 7258900, 7047883 and 7517578 in the name of Raksha et describes oriented in the magnetic field of thin-film pigment flakes and orientation methods such scales. All of the aforementioned patents and applications included in Dan�th document by reference for all purposes.

Application for U.S. patent US 20080069979, incorporated herein by reference, entitled “security image coated with a single coating with a visually distinct areas,” describes the security image that is formed from flakes having the first color is uniformly mixed within the framework of the flakes having the second color, different from the first. The flakes having the second color, have the ability to Orient in the magnetic field, and the flakes having the first color are non-magnetic and do not align or are not oriented in the magnetic field. When exposed to at least one area coated with a magnetic field which is essentially orthogonal to the substrate on which is deposited a coating of scales, provides a visible region having the first color, because the magnetic scales are upright and not with magnetic properties of the scales are placed flat on the substrate. In another area, which is not applied magnetic field, the visible region, having a third predetermined color different from the first or second colors. Although using this method is possible to obtain interesting effects, the present invention provides the use of a larger number of possible angles for coverage or provisions where the light strikes.

the Present invention provides the advantage of what are magnetic and non-oriented magnetic field scales have different behavior in a magnetic field. In addition, careful selection goniochromism characteristics and angle of the magnetic field lines allows to obtain a very useful protective coating that changes color when tilted from East to West or from North to South, and the protective coating has a different color when tilted from East to West or from North to South, and when you look at it at the right angle, the coating has a single color.

The aim of the present invention is to provide a coating, which shows two different effects of color changes when you look at it from two different directions and has a one color when you look at it at the right angle.

The aim of the present invention is to provide a color change between the first and second color when tilted relative to the first axis and providing a color change from first to third color when tilted around an axis perpendicular to the first axis, the first, second and third colors are three visually distinct from other colors.

Another objective of the present invention is the use of a mixture of oriented in the magnetic field of the magnetic color-shifting flakes and is not magnetic and not oriented non-magnetic color-changing scales, and red�t scales are the same in the fall light at the right angle.

Another objective of the present invention is the use of a mixture of only two different types of scales, placed and fixed in a particular orientation on the substrate, to obtain a color change from the first to the second color, or from first to third color depending on the tilt of the substrate.

Disclosure of the invention

According to one aspect of the invention provides a blend of pigment flakes containing the first set is oriented in the magnetic field of pigment flakes, which have the property to change color from a first color to a second color when the angle of view; and

the second set of scales that has the property of changing color from a first color to a third color or Vice versa when you change the angle of view, the first, second and third colors are three different colors.

According to another aspect of the invention provides a coating containing a mixture of magnetic flakes, oriented in the magnetic field, and magnetic scales, and magnetic scales change color due to the thin-film interference when the angle of view from the first color to the second color, and non-magnetic flakes change color due to the thin-film interference when the angle of view with a third color to the first color.

According to one aspect of the invention provides a pigment mixture� scales, containing the first set of non-magnetic pigment flakes (oriented parallel to the substrate) which have the property of changing color from a first color to a second color when the angle of view; and

the second set of magnetic flakes oriented in the magnetic field at an angle to the substrate having the property to change color from a first color to a third color or Vice versa when you change the angle of view, the first, second and third colors are three different colors.

Brief description of the drawings

Examples of embodiments of the invention are described in conjunction with the drawings, in which:

Fig. 1 is a graph of the color coordinates in the system Lab and color changing the color of the pigment when you change the angle in the range from 5° to 45°;

Fig. 2 - illustration of the invention, which is shown oriented in the magnetic field scales 205 and not oriented in the magnetic field scales 204, which are coplanar with the substrate;

Fig. 3 is a ray of light incident on the scales when the light source is at the point [Z, Y], and the observer is looking from the point [Z, - Y];

Fig. 4 - a ray of light incident on the scales when the light source is at the point [Z, Y], and the observer is looking from the point [Z, - X];

Fig. 5 - substrate, which are vertically arranged and lying flatwise scales, �ri light is incident at a right angle, in this case oriented and not oriented in the magnetic field scales have the same color;

Fig.6 is an illustration in which the product is tilted from the observer, as if it is rotated about the axis X shown in Fig.3;

Fig.7 is an illustration on which the product is tilted about the Y-axis, while the magnetic particles are oriented so that their plane coincide with the direction of observation, become visible;

Fig.8 is an illustration in which the magnetic particles are shown as squares with the cells of the checkerboard pattern, are particularly noticeable and the product changes color to Golden;

Fig.9a, 9b, 10A and 10b photography substrates, coated with a magnetic scales, changing the color from gold to green and not magnetic scales, which change color from green to blue, and the magnetic flakes are oriented in the magnetic field.

The implementation of the invention

The present invention provides a mixture of two types of scales: magnetically orientable flakes and not oriented in the magnetic field scales. Scales have common characteristics. Two types of scales are scales that change color as a result of thin film interference with the same at different tilt relative to the observer or when the angle of incidence of light to induce color change. In R�sive, after coating of a mixture of scales is applied to a substrate and exposing it to a magnetic field to Orient the magnetic flakes are preferred, when the inclination of the substrate from the East to the West there is a change in color from the first color to the second color, and at an inclination of the substrate from the North to the South there is a change in color from the second color to a third color, the first, second and third colors are different visually distinguishable colors.

Thin-film color changing pigments used according to the invention, belonging to the type described below have one color at a normal viewing angle and a different color at large angles different from normal. The perceived color of the pigment depends on the thickness of the separator in the optical structure of the Fabry-Perot. Therefore, the angle of incidence and angle of reflection are critical factors in the perception of color pigment when changing the thickness of the separator with increasing off-normal angle of incidence and reflection. When you angle changing the color of the pigment relative to the observer's initial pigment color gradually changes into another color. In the color coordinate system Lab color pigment varies along the curve going counterclockwise from one quarter of the space Lab to another, as shown in Fig. 1 for a hypothetical pigment that changes color with gold�on the green (101) or from green to blue (102) or from blue to red (103) when changing the angle from 5° to 45°. All the pigment particles are oriented more or less parallel to one another and the substrate and reflect incident light in the form of a bundle of essentially parallel rays.

The present invention uses a mixture of magnetic and non-magnetic pigment particles. The magnetic particles are laminated scales, which have a layer oriented in the magnetic field of the material. The mixture of magnetic and non-magnetic flakes dispersed in a binder material, preferably, an organic binder and may be applied by a printing method, as shown in Fig.2, on a flexible or rigid substrate. Ink 202 are put by a method of printing on top of the substrate 201. Ink contains magnetic particles 203 and a non-magnetic pigment particles 204. The particles may have a predetermined shape or may have a random shape. The width of the surface of the scales may have a size of from 1 µm to 100 µm. At the further formation of the coating on the substrate of the printed product is exposed to an external magnetic field in the direction 205; and all of the magnetic pigment particles are oriented parallel to the magnetic field lines and to each other in the direction of the lines of the magnetic field angle α 206 to the substrate and to the surface of the nonmagnetic particles. On the non-magnetic particles 204 there is no magnetic field, and they are parallel or nearly parallel�mi the substrate 201. As a result of the different spatial position of the magnetic and non-magnetic particles in the magnetic ink and the non-magnetic particles reflect incident light in different directions relative to the observer, as shown in Fig. 3 and 4.

Solely for purposes of illustration, oriented in the magnetic field scales are hexagonal in shape, and oriented scales 203 and 205 have a square shape. In addition, solely for purposes of illustration to visually differentiate between the two types of scales used chess and point the location of the magnetic and non-magnetic flakes, respectively. In reality, the scales are not arranged in such a way.

Fig. 3 shows that when the rays of light from a distant source 301 light located at coordinates XYZ, where X=0 into the surface of non-magnetic plates in zone 0, they will be reflected in the direction 303 to a point with coordinates XYZ, where X=0 and Y=0. Vector projection of the incident and reflected rays of light in the XY coordinates are in points A and B, respectively.

As shown in Fig. 4, light from the same light source is reflected from oriented in the magnetic field of the particles as non-magnetic particles shown in Fig.3. The light source 401 with the same XYZ coordinates, where X=0, comes into the zone 0 of the printed products along a direction 402 and is reflected from the NAC�at counterclockwise magnetic particles in the direction of 403 with XYZ coordinates, where Y=0 and X<0. The projection vector of the incident and reflected rays of light in the XY coordinates are now in a and C, respectively.

The same in Fig.3 and 4 is the direction of the incident light coming into the same area of reflection. From light reflected not inclined non-magnetic particles in the field, talking to the observer, and the reflected light focused by the magnetic field plates, changes its direction and reaches the observer, becoming invisible at certain angles of observation. The deviation of the sample relative to the X-axis by an amount of from 5° to 45°, as shown in Fig.3 and 4, will cause the color change of a non-magnetic pigment corresponding to a deviation of 0°, the color corresponding to the angle of 45°. Colors will change from gold to green to curve 101 in Fig.1, or from green to blue (102) or from blue to red (103). On a non-magnetic color effect pigment color magnetic pigment corresponding to a large angle. The deviation in the opposite direction relative to the Y-axis from 0° to 45°, as shown in Fig.3 and 4, causes a change in the color of the magnetic particles with a color corresponding to a large angle, the color corresponding to small angles. Now nonmagnetic particles reflect the light away from the observer, becoming invisible, and color of the product is determined by the magnetic pigment.

To reduce �liania color one pigment, for example, the magnetic pigment, the color of another pigment, such as non-magnetic pigment in a mixture of pigments using a common color. The example given of the pigments are shown in Fig.1. They represent the magnetic pigment 101 changing the color from gold to green, and the non-magnetic pigment 102 of changing color from green to blue, and the green is the common color for both pigments. Magnetic pigment 101 has a green color when the particles are oriented in the magnetic field at an angle of 45° to the non-magnetic particles. Non-magnetic pigment 102 of changing color from green to blue, is green when the angle is 0°, because the particles parallel to the substrate. Both have the same pigment color when you look at the product or substrate at a right angle, as shown in Fig.5. Most of the incident light rays are reflected back nonmagnetic changing color pigment particles 501, i.e., hexagonal plates with point location, with green color. Oriented in the magnetic field, the particles are green, because they are oriented at an angle of 45° to the substrate. When the product deviates from the observer, as shown in Fig.6, it is rotated about the axis X shown in Fig.3. Color non-magnetic particles, hexahedral particles with point location changes to blue according �Riva 102 in Fig.1. As noted previously, the arrangement of particles "polka dot" or in a staggered manner in the figures used to illustrate the differences between the two types of scales on the figures. Scales don't actually have this arrangement.

The tilting of the products relative to the Y-axis to the left according to Fig.7 the magnetic particles are oriented so that their plane coincide with the direction of observation, become visible. However, when the product tilts to the right, as shown in Fig.8, the magnetic particles, the squares of the checkerboard structure, become clearly visible, and the product changes color to Golden.

In the example embodiment of the invention shown in Fig.9a-10b, applied magnetic pigment, changing the color from gold to green, and the non-magnetic pigment that changes color from green to blue. The appearance of this combination of pigments shown in Fig.9a-10b. Green thumbprint containing these pigments, visible at normal viewing angle, as shown in Fig.9a. When the sample deviates from the observer, as shown in Fig.9b, the color becomes blue. The deviation back to normal angle leads to the return of green, as shown in Fig.10A. The deviation of the sample to the right changes color to gold, as shown in Fig.10b.

The mixture of color-changing pigments according to the invention can be applied d�I banknotes, labels, securities and other documents to which it is necessary to apply an attractive protective coating or changing the color of the coating.

1. The mixture of pigment flakes deposited as a coating on a substrate, comprising:
the first set is oriented in the magnetic field of pigment flakes, which have the property to change color from a first color to a second color when the first change in the angle of view; and
the second set of pigment flakes are not oriented in the magnetic field which have the property of changing color with the specified first color to a third color when the second angle of view different from the first, the first, second and third colors are three different colors;
moreover, these scales first and second sets applied to the substrate in a binder, forming the mixture of flakes;
these first and second plurality of flakes are of a specified first color when viewed on a substrate at a right angle, and oriented in the magnetic field scales are oriented essentially in the same way that is different from the orientation of the flakes are not oriented in the magnetic field, so:
the inclination of the substrate relative to the first axis leads to a change in the observed color with the specified first color at the second specified color, and
tilt �tlojki relative to the second axis, perpendicular to the first axis changes the color with the specified first color to a specified third color.

2. The mixture of pigment flakes according to claim 1, in which the first and second set of scales change color due to interference of light in thin films, and the first and second set of scales mixed together and flakes of the second plurality of flakes are essentially coplanar with the substrate.

3. The mixture of pigment flakes according to claim 2, in which the substrate is a filament, a bill or a financial document.

4. The mixture of pigment flakes according to claim 3, in which the width of the surface of the scales ranges from 1 µm to 100 µm.

5. The mixture of pigment flakes according to claim 4, in which the scales are essentially flat flakes having one or more predefined forms.

6. The mixture of pigment flakes according to claim 2, in which said mixture is ink or paint.

7. The mixture of pigment flakes according to claim 2, in which the first set of scales is up to 40-60% of the total number of scales.

8. The mixture of pigment flakes according to claim 1, in which the first set of scales is a number greater than 10,000, while the second set of scales is a number greater than 10000.



 

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Protective mark // 2544144

FIELD: physics.

SUBSTANCE: disclosed is a protective mark having a layer with a concealed polarisation image and a reflecting layer. The layer with the concealed polarisation image has isotropic and anisotropic regions; the layer with the concealed polarisation image is a dichronic light polariser based on organic layers of dichroic anionic dyes, and the layer with the concealed polarisation image has phase polarisation capability.

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FIELD: process engineering.

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53 cl, 14 dwg

FIELD: processes of making protecting members such as filaments for protection against counterfeit of valuable papers, possibly determination of authenticity of bank notes and other bank-papers and credit documents.

SUBSTANCE: protecting magnetic filament includes polymeric film base onto which laminate structure of protecting means is formed. Such structure includes first masking layer of metallic material applied on base and successively arranged layer of magnetic material to be detected, additional masking layer of metallic material and outer covering film layer of polymeric material. First masking layer is arranged between surface of polymeric film base and layer of detected magnetic material whose characteristic magnetic parameters are limited by respective values: 0.1 Oe < Hc < 1 Oe; Hc/Hs ˜= 0.95 -0.98 where Hc - coercive force of magnetic material; Hs - saturation field of magnetic material.

EFFECT: enhanced degree of protecting valuable papers.

3 cl, 4 dwg

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