Photographic Reproduction Processes

By treating the insolated paper with these solutions, the image is destroyed, and the paper can be used again. One operates as for sensitizing, taking care to desiccate the pape...

Good well-sized paper should be employed. Rives is too tender and absorbs too much. Steinbach is better. For small sizes, whatever be the paper selected, it is well to size it w...

_The Negatives.—_For the carbon process the negatives should be intenser than those intended for printing out on silver paper. However, good proofs may be obtained from any nega...

To tone, the plate is immersed for, say, ten minutes in A, then, after rinsing slightly, it is placed in B for the same period, rinsed again and flowed with C until the desired...

To ascertain when the exposure is correct, a few black lines can be traced on one of the edges of the margin of the design, and strips of the sensitive paper placed upon them to...

then etched as done to engrave in the aquafortis manner, the corrections being made by applying with a brush some of the above varnish on the defective parts, which are worked o...

“When the picture has fully come out, which is generally from three to ten minutes at the very most, it is removed from the developing bath, placed in cold water and washed very...

INTRODUCTION. THE DESIGNS. THE CYANOTYPE OR BLUE PROCESS. THE CYANOFER. (Pellet’s Process.) THE BLACK OR INK PROCESS. (Ferro-tannate Process.) THE CUPROTYPE. (Burnett’s Process....

the proofs undergo the following gradation of colors: red, reddish violet, blue-violet, black and greenish black. As soon as the desired color is obtained, the proofs are washed...