化學(xué)配方數(shù)據(jù)庫(kù)
| 配方類(lèi)型： |
COATINGS |
| 配方說(shuō)明： |
Fluorescent Coatings |
| 配方組成： |
Fluorescent pigments are compatible with most vehicles, with a few
exceptions. For example, the restriction as to solvents must be
considered when formulating lacquers and moisture set inks. they can be
used in emulsion systems when the pH does not exceed 8.0-8.5. Vehicles
containing large amounts of drying oils will decrease the fluorescence.
Some of the recommended vehicles are
Ethylcellulose
Lawters #1561 and #1564 Quickset Vehicles
Lawters #1517 Moisture-set Vehic |
| 配制方法： |
Optimum amounts of fluorescent for each formulation can be determined by experimentation. Typical paints and lacquers may contain 1.5 to 2 parts of pigment to 1 part of vehicle solids by weight, plus the necessary extender pigments to produce the desired effect. high vehicle solids formulations, such as lithographic inks will have a lower pigment to vehicle solids ratio.
Small amounts of transparent extenders such as silica gel, talc, calcium carbonate, etc., may be used with HI-VIZ pigments. These extenders impart light diffusing and surface matting properties to the coating.
This reduces the drytime and increases the brilliance of the coating when it is viewed from an oblique angle.
Opaque white pigments such as zinc oxide and titanium oxide should not be used with HI-VIZ pigments as they will greatly reduce color strength and fluorescence. Of course, small amounts may be used if a special tint is desired and the loss in fluorescence is not important.
Care should be used in mixing HI-VIZ |
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