Effects of using dyes from coffee grounds for dyeing bamboo strips in handicrafts

Abstract

This research is an experimental research study to study the effect of using dye from coffee grounds for dyeing bamboo sticks in handicrafts. It began with a study of the extraction of dyes from coffee grounds. The factors that were studied and tested included the type of coffee grounds which were changed into 2 types, consisting of fresh coffee grounds and coffee capsule grounds. And study the amount of coffee grounds, varying it into 2 levels, consisting of 200 and 400 grams per 1,000 milliliters of water. A total of 4 items were obtained, which were then analyzed for color using the L* a* b* system. The results of the experiment found that fresh coffee grounds in the amount of 400 grams per 1,000 milliliters of water is most suitable for use in dyeing bamboo sticks. It was found that the brightness value (L*) was equal to 62.29 + 0.22, the a* value was equal to -2.44 + 0.06, and the b* value was -5.85 + 0.06. After that, it was tested for dyeing on bamboo sticks. The factor studied was the type of adhesive agent was divided into 2 types, consisting of alum and table salt, and the time for soaking the adhesive agent was studied in 2 periods, consisting of 12 hours and 24 hours, to obtain a total of 4 experimental items. When tested for color value, it was found that products using alum were the adhesive agent, and soaking time of 24 hours has the best product color properties with an L* value of 74.02 + 0.50, a* value of 5.04 + 0.35, and b* value of 5.99 + 0.36, which is appropriate. To be further developed in basketry products very well.