Journal of the Asiatic Society of Bengal, المجلد 47،الأعداد 1-4Asiatic Society of Bengal, 1878 |
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الصفحة 68
... film and , either laying it down again on a sheet of glass in a reversed position , or using it as a film negative which may be used for giving both reversed or unreversed images . This method is practical and useful , but is not ...
... film and , either laying it down again on a sheet of glass in a reversed position , or using it as a film negative which may be used for giving both reversed or unreversed images . This method is practical and useful , but is not ...
الصفحة 71
... film of gold and the print takes a more agreeable tone , also becoming more permanent than it would be if this operation , called ' toning , ' were omitted . It is , however , impossible to ensure perfect permanency of these prints , by ...
... film of gold and the print takes a more agreeable tone , also becoming more permanent than it would be if this operation , called ' toning , ' were omitted . It is , however , impossible to ensure perfect permanency of these prints , by ...
الصفحة 88
... film . A thin coating of printing ink is then applied all over the stone with a roller , and the surface is afterwards washed with warm water in which a little starch has been dissolved . This gradually removes all the soluble parts of ...
... film . A thin coating of printing ink is then applied all over the stone with a roller , and the surface is afterwards washed with warm water in which a little starch has been dissolved . This gradually removes all the soluble parts of ...
الصفحة 89
... film as the printing surface . Messrs . Tessié de Mothay and Marechal were also the first to recognise the necessity of adding a certain proportion of acid or of oxydising or reducing agents to the chromate salt used for sensitising the ...
... film as the printing surface . Messrs . Tessié de Mothay and Marechal were also the first to recognise the necessity of adding a certain proportion of acid or of oxydising or reducing agents to the chromate salt used for sensitising the ...
الصفحة 90
... film . His films consisted of albu- men , gelatine and bichromate of potash alone , and he gave them the required solidity and adherence to the glass by first coating the plate with a sensitive colloid mixture containing a large ...
... film . His films consisted of albu- men , gelatine and bichromate of potash alone , and he gave them the required solidity and adherence to the glass by first coating the plate with a sensitive colloid mixture containing a large ...