I. Brief Introduction

Photochromic dyestuffs are substances exhibit phenomenon of reversible color change, witch are induced by UV-Light. The color reveals when it is exposed to sunlight/ UV-Light and lose this light activated coloration when the light source is removed. The color strength depends on the sunlight / UV.Light.

II. Products

A) Direct Mixing of basic colors

By the primary colors, you can create new colors as your expectation. It could be colorless to color.

 B) Coat Mixing Of Created/Basic colors

The color can be from one to another by mixing photochromic colorants and regular solvent dyestuffs.

III. Application

The photochromic dyes have generally been used in paints, inks, dyes and dyes fabrics etc. Finished products could be Doll hair, toy products, sunglasses, lunch, boxes, crayons, elly shoes, hair clips, hair combs, shoestrings, coasters, craft beads, PVC belts, watch bands, drinking straws, spoons, cups, Frisbees, combs, greetings cards, stickers, business cards, UV detection devices, T- Shirts, security, badges, garments of all sorts, nail polish and so on.

IV. Product Characteristics

A) Photochromic Dyestuffs

1. The photochromic dye can be dissolved in various organic solvents such as toluene, xylene, methyl ethyl ketone, Ethyl acetate etc.

 2. By mixing the primary colors, a color can be matched to show colorless or light color to color. And also can mix with other regular dyes to have the effect of color to color.

3. Heat resistance of photochromic dyestuffs is different. YL-10 at 240ºC, RL-30 at 222ºC, BL-60 at 256ºC and VL-70 at 236ºC.

B) Photochromic Microcapsule powder (C-Series)

1. Photochromic microcapsule powder is mode from photochromic dyes and some additives, which is applied as a pigment.

2. It is safe and stable in its color change function for a long period of time.

3. Distribution of particle size is between 1~10 micrometer and heat resistance is at 230ºC.

4. It is easy to disperse and compatible with regular pigments.

C) Photochromic PS powder (S-Series)

1. Photochromic PS powder is made from 1.5% photochromic dye and 98,5% PS resin by extrusion process.Then mill it to be very fine powders, which is about 8~15.

2. The water content is below 0,5% and the heat resistant is at 140ºC.

D) Photochromic Masterbatch  (E-Series/A-Series)

1. Photochromic masterbatches (PE/PMMA) are mede from 1% photochromic dyes 99% of copounds, special photo-stabilizers and antioxidants.

2. Our PE photochromic masterbatch can be applied in PE, PP, TPR and EVA etc.

3. PMMA photochromic masterbatch especially apply to PMMA.

5. Application & Formulation

A) Some of the products are FDA approved. There is no harmfulness to body health. Fit the requirements for the demands of safety toys and the food package standards.

B) The products must be stored at room temperature, in dry area and not exposed to sun. The shelf life is one year.

C) Different solvents and materials will affect the change in color of the products.

D) The ability of reverse might be fatigued if exposed to UV light, acid condition, wet and radiation for a long time.

E) When colorants are applied for screen printing, 80~150 mesh is recommended.

F) The best ink basic materials are PU/Acrylic resin.

G) Dosage of application

Materials	Tintas/ Tintas de impressão – solvente		Tintas/ Tintas de impressão – aquosa		Plasticos Injeção - Extrusão
	Application	Advise Addition	Application	Advise Addition	Application	Advise Addition
Photochromic Dyes		0,02 – 0,1%	X	-		0,01 - 0,1%
Photochromic Pigment		3,0 - 30%		3,0 - 30%		0,2 - 5,0
Photochromic Masterbatch		-	X	-		1,0 - 5,0