Natural Dyeing of Fabrics with Guava (Psidium guajava L.) Leaf Extract II - Dyeability and Functional Property of Cotton Fabrics -

Abstract

:The natural dyeing of cotton fabrics with guava leaf extract was investigated. The temperature and time of dyeing are 40 o C and 90 o C for eighty minutes, respectively. In addition, the dyebath has been set at pH 5. Sn pre-mordanted fabrics showed the highest K/S value. Regardless of dyeing temperature, K/S values were high when Al, Cu, Femordanted fabrics were dyed in post-mordanting and Sn-mordanted fabrics were dyed in pre-mordanting. The K/S value of dyeing fabrics could be increased with repetitive dyeing and mordanting. Compared to untreated dyed fabrics, the K/ S values of fabrics which had been treated with soybean milk, chitosan and gall nut tannin were increased. The changed surface colors of fabrics that were treated with soybean milk, chitosan and gall nut tannin were Y, YR and achromatic colors. Fabrics dyed with alkaline water extract showed reddish color. Sn-mordanted fabrics dyed with acidic water extract showed vivid yellowish color, and Cu-mordanted fabrics dyed with ethanol extract showed yellowish green color. In case of Sn-mordanted fabrics, the washing fastness was level 4. The dry cleaning fastness also showed very excellent result with level 4-5. The rubbing fastness was better in dry rubbing than in wet rubbing of the fabrics. For the light fastness, all dyed fabrics showed low fastness. For antibacterial activity, the powder of guava leaf extract and the dyed fabrics with guava leaf extract showed 99.9% of high antibacterial activity. All dyed fabrics showed higher deodorization and UV protection rate than control fabric.

Natural Dyeing of Sheep Leather with Amur Cork Tree

“…전통 천연염료의 이용에 대한 연구에서 더 나아가 새로운 염재로 연 고사리 (Lim & Jang, 2014), (Lee 모과 가자열매 & Kang, 2014), (Nam & Lee, 2012), 구아바 (Nam & Lee, 2014), (Han & Lee, 2012), 메타쉐콰이어 라벤다 (Jun, Yoo, & Shin, 2015), 까마중 참소리쟁이 (Park, 2006), (Park, 2007), ( Figure 5 이 증가한 것에 기인한 것으로 판단된다.…”