RANG

RANG, 1) masnuoti loku ranguboriest, ki az moddahoi payvasti (ruyashon shakhshavanda) va pigmenthoi organiki yo gayriorganikb tarkib yoftaast. Dar tarkibi Rang inchunin halkunandaho va digar moddaho budanashon mumkin. Ravgani rastani yo olifho, lokho, yane mahluli tabii yo sintezii oligomerhoi (polimerho) tarkibi halkunandahoi organiki, mahluli obakii shireshi nabototu hayvonot, shishai moe (Pangi silikati) va gayraro chun moddahoi payvastii Rangi istifoda mebarand. Dar sanoat Rangro asosan dar shakli suspenziyahoi galiz yo obaki istehsol mekunand. Pigmenthoro bo moddahoi payvasti meomezand, bad pigmenthoi mahluli hosilshudaro khele mesoyand, dar natija Pangi galiz hosil meshavad. Baroi hosil kardani suspenziya ba Rangi galiz halkunandahoi makhsus yo olif hamroh mekunand. Pangi sakht (dar shakli takhtachahoi alohida, masalan, Panghoi akvareli-obi) va khoka niz istehsol mekunand. Rang az rui tainot ba Ranghoi khojagi, tasviri va poligrafi judo meshavad. Rangro dar khojagii khalq va hayoti maishi aso­san baroi khushnamud kardanu az tasiri nami, nuri oftob, moddahoi khimiyavi, harorati baland, magor va gayra emin doshtani ashyo istifoda mebarand.

2) Ranghoi minerali, pigmenthoi tabii, mineralhoi safed yo harranga, jinshoi kuhi, madan va gayra, ki chun moddai rangkunanda istifoda mebarand. Chunin navhoi Ranghoi khimiyavi malumand: karbonati, silikatiyu loy, oksidi va gidrooksidi, sulfati, uglerodi va gayra. Bazan sulfidho va fosfathoro ham ba sifati moddahoi rangkunanda istifo­da mebarand. Ranghoi tabii khele ustuvor va ba tasiri rushnoiyu atmosferb tobovar meboshand. Ranghoi tabii khele farovonand va rohi istifodaashon ham oson ast. Az in jihat onho az Ranghoi sintetiki afzaltar donista meshavand. Ranghoi silikatb, oksidi va uglerodi, ki dar sanoatu sokhtmoni tekhniki, poligra­fiya va sanati tasviri istifoda meshavand, az digar navhoi Rang mamultarand.