Plantas tintoriais da caatinga uma prospecção!

Abstract

Due to the productive conveniences of the industries and the current disinformation regarding the issue of environmental preservation, the use of manual dyeing and vegetable dyes fell into disuse due to the advent of industrialization and the introduction of artificial dyes at the end of the 19th century, however , in recent years, in the face of the advances of science bringing knowledge, concerns and instructions that aim at the technological development ecologically has provided growing demand of natural dyes for their low phytotoxicity they present. Considering the tintorial potential of many other species of the Caatinga, it was decided to refer the 08 species of this biome to perform dyeing tests to evaluate their potential dyeing, observing which parts of these plants are most prolific in this characteristic, testing formulations economical and easy to prepare, and finally, compose color chart from the obtained dyes. Specimens were collected and subjected to grinding in a condiment mill and passed through a final grinding in domestic blender until they were reduced to powder. These powder samples were weighed and subdivided into three 2g samples, three subsamples of 2g of bark and 3 of leaf. Each of these sub-samples were diluted with alcohol alcohol in different proportions of alcohol (25, 50 and 100 mL). Each of the subsamples were painted on screen and evaluated by 10 students, who scored from 0 to 5. The evaluated plants showed good bark and leaf dyeing properties. Recommended for deployment in the textile and handicraft industries. Among the bark extractions only Caju and Pereiro had low pigmentation and were not recommended for the dyeing purpose. Among the leaf extractions, only Jucá did not present satisfactory tintorial potential.