1, eliminating muscles. Take the internal organs first, scald them with boiling water, and remove them after the muscles are tight. Pay attention to ironing time. Small fish have a shorter time. Scalding for too long will burn the ligaments.

2, then etching, using 0.5 ~ 1% sodium hydroxide solution.

3. degreasing. Xylene is generally used. The time is different. At this time, we should also pay attention to the fact that xylene will harden the bones, and we should do modeling before degreasing.

4, bleaching, this is now using hydrogen peroxide.

5, plastic surgery. Put the bleached bone flat on a wooden board or a foamed plastic board, arrange the body and limbs in a natural posture, and fix it on the board with clips and pins to prevent the specimen from deforming during drying.

6. installation. upper reaches of the Yangtze River