Starch Removal Process with Hydrochloric Acid

starch removal process aims to eliminate starch on warp yarn with starch hydrolisa using strong acids that can facilitate the process of further improvement.

acid can hydrolisa not soluble starch into glucose in water-soluble in water.
material soaked in sulfuric acid or hydrochloric acid 5-10ml for 1.5-2 hours at a temperature of 30-40 ˚ Celsius. execution process performed by a longer time to prevent damage to the fabric fibers. then washed clean cloth. when washing is not so clean cellulose fibers will be attacked by the remaining acid and occurred hydroselulosa. to prevent these things should be done to eliminate the neutralization process remains acid.

laboratory test

tools and materials
- Gray cloth
- Water
- HCL
- Scales
- Glass beaker
- Stick
- Pipette

recipes
- HCL = 5-10 ml / l
- Temperature = 30-40 ˚ C
- Time = 2 hours
- Vlot = 1:30

job step
1. prepare equipment and materials
2. weigh fabric to be processed
3. calculate the water needs and in accordance with the prescribed HCL
4. HCL and water poured into the glass beaker
5. heating the solution and insert the fabric into the solution and stirred
6. took the cloth from the solution after processing for 2 hours
7. wash cloth to clean
8. after washing, the fabric is dried with direct sunlight

starch removal process with hydrochloric acid at a temperature very affected workmanship. if the temperature is right then starch will dissolve in water. results of this process is the fabric becomes softer and can apply more water than before.(wahyu)