Product Features
l Variable tint UV cured coating applied via spin coating.
l Darkens upon exposure to UV light present in outdoors sunlight (process starts within a few seconds; completely converts to its deepest shade in 20 to 30 s) and reverts to a transparent state when returning indoors (transitions to fully transparent in around 2 min). The transparent to dark (and vice versa) can be repeated without deterioration in effectiveness.
l Available colors include: gray (8210), brown (8220), purple (8230), blue (8230), pink (8240), green (8250)...etc.

Product Specifications

Product Number:	8200
Appearance:	Translucent liquid with a yellow tinge
Resin Type:	Modified acrylate
Solid Content (ASTM D5403):	≥98%
Specific Gravity:	1.05 ± 0.02
Viscosity (25 °C, Brookfield LVT #4):	200 ~ 400 cps
Photocurable Energy (365 nm):	200 ~ 600 mJ/cm2
Refractive Index (before / after cure):	1.50 / 1.51
Light Transmittance (after darkening):	<25%
Volume Shrinkage:	<3.5%
Boiling 5% NaCl Solution Resistance:	<15 min
120 °C, 2 hr Oven Test:	Pass
Applications	Substrates
UV cured variable tint coatings for optical lenses for photochromatic glasses.	CR-39 resin lenses (RI: 1.502) PC lenses (RI: 1.590) Other high RI resin lenses (RI: 1.56, 1.60, 1.64, 1.71)

Recommended Application Parameters
Product hue can be changed with a variety of dyes.
UV irradiation is to be applied during the spin coating procedure. Make sure in advance the UV lamp illumination values meet the conditions.
Product Package: 20 kg (in plastic drum)
Notes:
Must be stored in a cool (15 ~ 30 °C), well ventilated place, avoid direct exposure to light.
Effective for a period of 9 months after the date of manufacture.