LIQUID DEVELOPER FOR CAPILLARY FLAW DETECTION Russian patent published in 2002 - IPC

FIELD: capillary flaw inspection; developers for luminescent and color inspection of important parts. SUBSTANCE: liquid developer is nontoxic material, its composition is as follows, mas.g: filler of titanium dioxide, 0.01-2.5; film-forming material of mixture of polyvinyl pyrrolidine and silica powder, 2-7.5; solvent mixture of alcohols and 2- 4 atoms of carbon or dialkyl esters, the balance. Proportion of polyvinyl pyrrolidine and silica powder in mixture is 2:1 and alkali mixture used for solvents is mixture of butyl and isopropyl alcohols in proportion 1:4:(45- 50); dibutyl or dimethyl phthalate mixed up with acetone and isopropyl alcohol in proportion 1:(30-40) is used as dialkyl solvent. Developer ensures effective quality control of great number of large components having complex configuration. EFFECT: high sensitivity, short drying time. 4 cl, 1 tbl