| 摘要 |
An electric heater is silk screened on an interior surface of a cellulose diacetate visor by applying silk screening ink through a silk screen mask to a flat cellulose diacetate blank. The ink is then dried by being heated to between 120 DEG F.-150 DEG F. for about 20 seconds, preferably by air jet drying. The cellulose diacetate sheet is then formed into visor shape and cured by heating in an oven at about 325 DEG F. for about 20 minutes on a drape and/or vacuum form. The temperature of the visor during the drying, as well as bending and curing stages, is carefully controlled to assure proper application of the ink as well as the mechanical integrity and transparency of the visor.
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