Sir Knight L. K. says that in developing he develops his plates till the image can be seen on the back of the plate, but after the plate is fixed, while the picture is distinct the negative is nearly transparent, and wishes to know the reason. It is because the development has not been carried far enough. The best test of development is to hold the negative to the light and look through it. If it does not appear dense enough it is not developed sufficiently, and must be returned to the developer. A negative will look nearly the same after fixing as it does when examined before fixing. The method of testing development by the image on the back of the plate is not a true test.
Sir Knight Joseph Peri asks what is used in retouching negatives. 1st, What is used to make the negative print black; and 2d, What is used to make it print white. Soft lead-pencils are used in retouching negatives. Any spot in the negative which is filled up or marked over on the negative will print white or light in the negative. To make the print of the negative black in certain places the film is removed by a reducing solution. Alcohol applied lightly with soft linen or cotton will reduce or thin the film where it is not very thick. Ferrocyanide of potassium dissolved in water is a powerful reducer, and will remove the film entirely, leaving clear glass, if such an effect is desired.
It costs a little more, but with chapped hands and clothes weakened by the free alkali in common soaps, the housekeeper soon finds that Ivory Soap is the cheapest in the end.
The Procter & Gamble Co., Cin'ti.
There is just a little appetizing bite to HIRES Rootbeer; just a smack of life and good flavor done up in temperance style. Best by any test.