| 摘要 |
FIELD: chemistry.SUBSTANCE: method of processing lake frog includes soak, fleshing, degreasing, fermentative processing, degreasing, washing, liming, partial de-ashing, softening, pickling, tanning, neutralisation, after-tanning, decoration operations. First fermentative processing of frog skin is realised by preparations Pectophoetidin G20x with concentration 2.0-2.5 g/dm, Celloviridin G20x with concentration 2.0-2.5 g/dmand Protosubtilin G3x with concentration 2.2-2.7 g/dmwith the total liquid coefficient1.6 and temperature 32°C in drum in rotation-stop mode for respectively 5 and 30 min for 90 min. Second fermentative processing - properly softening is carried out after the process of liming with application of Ca(OH)with concentration 10.0-13.0 g/dmand NaS with concentration 1.5-2.5 g/dmand partial de-ashing to pH=9.0 by proteolytic enzymes: alkaline protease Protosubtilin G3x with concentration 2.0-3.0 g/dmfor 90 min. Tanning is realised in three stages: at first with potash alums with concentration 10.0-15.0 g/dm, then by chrome tanning agent with concentration 10.0-13.0 g/dmand after laying and neutralisation with NaCOwith concentration 4.2-4.9 g/dmafter tanning is carried out with syntan "Basyntan" with concentration 10.0-18.0 g/dm.EFFECT: method of processing improves physical-mechanical characteristics of frog skin to a considerable extent.1 tbl, 1 ex |
