CHEMICAL AND METALLURGICAL ENG, NEERING 321 Electrodeposition of Mold or Alto Plate For the accurate reproduction of engraved ... Up to this time no reliable means of measuring the aquot;abrasion hardnessaquot; of thin layers of lXiAri1|a#39;tlff. ... It is believed, however, that by further improvements and by increased experience in the methods of using such plates this service may be appreciably increased.
|Title||:||Chemical & Metallurgical Engineering|
|Author||:||Eugene Franz Roeber, Howard Coon Parmelee|