. The silver sunbeam : a practical and theoretical text-book on sun drawing and photographic printing. immersion in the bath. Inall cases, immediately afterplacing the plate in thebath, it should be movedboth vertically and horizon-tally for a short time, other-wise streaks in the direc-tion of the dip are likely tooccur. 3. Streaks acrossthe plate at right angles tothe line of dip are causedby irregularity of motionin dipping the plate. It isvery important to acquirea uniform, steady movement of the hand in dipping the plate,and care should be taken not to lift the upper portion of the plate
. The silver sunbeam : a practical and theoretical text-book on sun drawing and photographic printing. immersion in the bath. Inall cases, immediately afterplacing the plate in thebath, it should be movedboth vertically and horizon-tally for a short time, other-wise streaks in the direc-tion of the dip are likely tooccur. 3. Streaks acrossthe plate at right angles tothe line of dip are causedby irregularity of motionin dipping the plate. It isvery important to acquirea uniform, steady movement of the hand in dipping the plate,and care should be taken not to lift the upper portion of the plate out of the solution* until it has been some-time immersed, as by sodoing marbled stains andrings are apt to be formedon the exposed part. case any foreign solu-tion should become mixedwith the developer at thetime of pouring upon theplate, such as the drip-pings of former develop-ments running off the bot-tom of the developingglass, unpleasant stainswill occur. To avoid this,keep a rag or piece ofblotting paper ready toabsorb any fluid that maybe found on the bottom ofthe glass. 5. Streaks of. DEFECTS AND REMEDIES. 553 Fig. 37. a zigzag shape sometimes will be found proceeding from thepoint where the dipper touched the plate. This is more likelyto occur with hard rubber dippers than glass or avoid this trouble, dip the plate slowly. 6. Keversingthe position of the plate after taking it out of the bath islikely to cause streaks. As a general rule, the direction ofthe drainage of a plate shouldnot be changed from the timeof removal from the bath untilthe application of the devel-oper. 7. Using the dustingbrush, care must be taken tohave the broad brush used toclean dust from the surface ofthe plate perfectly dry. in the direction of thedip are caused by lack of acidin the bath. The obvious rem-edy is to add carefully a littlenitric acid. 9. Spots and Pin Holes. Occur from two or morecauses—dust and crystals ofiodo-nitrate of silver. These,occurring u
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