| 摘要 |
<p>METHOD FOR MAKING AN ETCH-RESISTANT STENCIL The method comprises applying to a surface to he etched a coaling of a liquid composition having a pH between 5.8 to 7.0 and comprising an alkali caseinate, an alkali dichromate photosensitizer, and water. The layer is dried, photoexposed, developed, and then baked to produce an etch-resistant stencil.</p> |
