I today I work on a old picture...I took in 1982. The size is 5X5inc. and a BW one in this papaer quality..have tomention so much was important....Translated by Google ... "In photography black and white, there are two types of paper: plastic paper called RC (Resin Coated) which is easiest to treat, times of development being rather short, and barytpaper or paper fibre. The big problem of this paper is that it gondole with drying, even worse, but then why use such a paper? Quite simply because it gives blacks much major, that paper is thousand times more pleasant at the touch and that its conservation is 10 times higher than that of paper RC! (1 century approximately... if the treatment is perfect); this comes owing to the fact that the gelatine is encrusted in paper. In short, this paper is true a fight at the laboratory... in against part, its real beauty and its behaviour makes of it ideal paper for presentations worthy of this name (in particular for the exposures...), the spotting is very pleasant to make and remains invisible. Let us note that it is a paper for the black and white since there is not nonplastic paper photographs colors of them... Black photographic pulling & silver Blanc are the photographic process most widespread in which the photographic uslion consists of money salts. The development of the image is done in an "automatic" way in revealing liquid.(I still have the smell in my nose.) I Scan it at 600 ppp...and after hours I try to give with PSP7 the render of Sepia...Finally I choose this one in my modern laboratory ....This is my former Cat and Love and Mate Chi-Chan and a model. Thanks for sharing your teacher....Hugs Sylvaine