S SERIES OF PHOSPHORESCENT PIGMENTS

1. Introduction:

.......We have succeeded in developing a new material which has excellent anti-moisture. This material developed by the company shows very wide spectrum. The material is named silicate in series.

2. Characteristics:

a. It isn't contain any radioactive substance, warrants safety for humans body.
b. It has a variety in material colors and emission colors. At present, the emission colors in green, blue, yellow-green, blue-green are on sale and the materials colors are title different with each others.
c. Good water resistance behavior. If it was socked in the water for a long time, its brightness at same time is almost no declined.
d. It has the light emission function thanks to its stable crystal structure. It may be used in semi-permanent ways under proper conditions.

3. Physical properties:

Items Test results of S series products
Color of emitted light blue blue-green green yellow-green
Chemical identity oxide
Specific gravity (g/ml) 3.0
Water <0.05%
Excitation spectrum(nm) 200-450
Emission wavelenght(nm) 470 485 500 520
Afterglow brightness(1)(mcd/m2) 95 100 79 60
Afterglow extinction(min)(2) 2500 2000 1320 820
Excitation time(min) (3) 10
Chemical stability excellent
Footnotes: (1) brightness after 10 min, excitation with a D65 illuminant for 10 min, at 1000LX.
(2) time span necessary for afterglow brightness to diminish to 0.32mcd/m2
(3) time required for saturation with standard D65 illuminant at 1000LX

4. Application:

(1) How to use the luminescent material
A. Paints and Coatings:
.......a. Use a transparent solvent vehicle with neutral pH.
.......b. Do not grind the pigment, just stir. If possible use light colored ceramic or glass lined vessels.
.......c. To minimize settling, use a viscous vehicle or anti-settling agents, stir well prior to application.
.......d. Apply a white base coat under the phosphorescent layer to improve afterglow.
.......e. All additives should be free of heavy metal compounds.
.......f. Plan on using 20 to 60 percent pigment. (by weight)
.......B. Inks, Silk Screen & UV curved:
.......a. Viscosity of inks should be about 3000-5000 poise. During printing, viscosity should be adjusted by using a diluting agent based on printing speed.
.......b. Apply a white base coat under the phosphorescent layer to improve afterglow.
.......c. Minimum film thickness of the layer should be 100um. In order to achieve maximum afterglow, a film thickness of 130-150um is required. For achieving this thickness two passes may be necessary.
.......d. Ideal screen size would be 80-100 mesh. Larger screen openings would give better results.
.......e. To minimize settling, using a viscous vehicle and/or anti-settling agents. Also stir well prior to printing. f. One pound of dry can cover 3.5 square meter area.
.......C. Plastics:
.......a. It is compatible with acrylic, polyester, PVC , etc.
.......b. Material can be cast, dipped, coated, extruded or molded.
(2) Range of Application
A. Position marking: Sockets of electric switches, outlets and keys, portable flash light, staircases, roads, emergency kits, extinguished, fire alarm lifesaving equipment, etc.
B. Safeguarding: Signals, umbrellas, alarming characters and pictures, access roads, underground passageways in subways, ports and harbors, hospitals, emergency equipment, caps, bicycles, helmets, speaker, children's clothes, work clothes and other safety markings.
C. Building: Walls, tiles, elevator insides, bridges, ways, etc.
D. Others: Calendars, nameplates, stationary, novelties, fishing goals, toys, etc.
Global Trade Alliance Inc. - P.O. Box 15172, Scottsdale, Arizona 85267-5172
Telephone: 602-803-8303, Fax: 480-391-0133, Email: goods@gtamart.com