. The book of photography; practical, theoretical and applied. Fig. 204.—Special Rocking Arrangement for Washing Plates. AlumCitric acidWater. stained, and a clearing bath may be de-sirable. Here is a good formula for this: 2 OZ. 10 OZ, BiiiH Fig 205 iiililisp .—Rose and Filter Attachment for Tap. Wash a few minutes after fixing, and im-merse the negative in the solution. Aformula especially successful in removingthe yellow stain caused by prolonged is:— Saturated solution of alum ... 20 oz. Hydrochloric ... ... 1 oz. This is used afterfixing, first washingthe neg
. The book of photography; practical, theoretical and applied. Fig. 204.—Special Rocking Arrangement for Washing Plates. AlumCitric acidWater. stained, and a clearing bath may be de-sirable. Here is a good formula for this: 2 OZ. 10 OZ, BiiiH Fig 205 iiililisp .—Rose and Filter Attachment for Tap. Wash a few minutes after fixing, and im-merse the negative in the solution. Aformula especially successful in removingthe yellow stain caused by prolonged is:— Saturated solution of alum ... 20 oz. Hydrochloric ... ... 1 oz. This is used afterfixing, first washingthe negative for afew minutes. Afterclearing, the negativeis allowed to wash forthe usual time. Withcareful working, theclearing solution willseldom be needed,although some photo-graphers make apractice of using itin every case. 126 THE BOOK OF PHOTOGRAPHY. Importance of Thorough Washing. It is necessary that every trace of hypo,should be removed from the gelatine secure this, nothing is better than anhours washing under the tap, the platesbeing stood up in a grooved tank. Thereare various patterns of tanks in use, one of KALEVIMAG
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