Idayi zesulfureziimolekyuli ezintsonkothileyo ze-heterocyclic okanye imixube eyenziwe ngokunyibilika okanye ukubilisa iikhompawundi zezinto eziphilayo eziqulethe amaqela e-amino okanye e-nitro aneNa-polysulphide kunye neSulfure.Idayi zesulfure zibizwa njalo njengoko zonke ziqulathe unxibelelwano lweSulfur ngaphakathi kweemolekyuli zazo.

Idayi zesulfure zinemibala emininzi, iikhompawundi ezinganyibilikiyo emanzini kwaye kufuneka ziguqulwe zibe ziindlela zokunyibilika emanzini (lucoforms) phambi kokuba zifakwe kwimathiriyeli yelaphu.Olu tshintsho lwenziwa ngonyango olune-arhente yokunciphisa njenge-dilute i-Na2S enamanzi.Kuba le lucoform yedayi yeSulfur inamandla kwizinto ze-cellulosic.Zifunxwa kumphezulu wefiber.Emva koko ziphinda ziguqulelwe ngamanzi asekuqaleni anganyibilikiyo kwidayi nge-oxidation.Le oxidation iqhutyelwa "ngomoya" (ukuvezwa emoyeni) okanye ngokusebenzisa i-oxidizing agent efana ne-Na-dichromate (Na2Cr2O7).

Ii-arhente zokunciphisa ziguqula "i-S" kwidayi ibe kwiqela le-SH kunye namakhonkco eSulfur.Emva koko ngaphakathi kwemathiriyeli i-thiols equkethe amaqela e-SH i-oxidized kwaye ngaloo ndlela ibuyiselwa kwimo yendalo yedayi.

Oku kuboniswe apha ngezantsi:

Idayi-SS-Idayi + 2[H] = Idayi-SH + HS-Dye

Idayi-SH + HS-Dye +[O] = Idayi-SS-Idayi + H₂O

Isulfure inika iziphumo ezilungileyo (iToni eKhanyayo) xa isetyenziselwa ukuvelisa izithunzi ezimnyama, eziMnyama & ezimdaka ngebala kodwa izithunzi ezibomvu azinakufunyanwa ngeedayi zeSulfur.
 
Imbali yedayi yeSulfur ingashwankathelwa ngolu hlobo lungezantsi:

1. Iidayi zokuqala zeSulfur apho zenziwe ngo-1873 zokufudumeza zabona uthuli, i-caustic soda kunye neSulfur.Kwenzeka ngengozi xa inqanawa yokusabela equkethe i-Na2S yayivuza kwaye uthuli olusarha lwalusetyenziselwa ukusula isisombululo esiphumayo.Ethubeni ilaphu lomqhaphu lidibane nolu thuli lwesarha lungcolisekileyo kwaye libe nebala.

2. Oyena vulindlela weedayi zeSulfur waba vidal abavelisa i-vidal black (Igama ledayi yeSulfur) ngokudibanisa ipara-phenylene diamine kunye neNa2S & Sulfur ngo-1893.

3. Ngo-1897 uKalischer wavelisa i-Immedial Black FF ngokufudumeza i-2, i-4-dinitro-4-dihydroxy diphenylamine kunye ne-Na-poly sulphide.

4. Ngomnyaka we-1896 i-Read Holliday yazisa uluhlu lweedayi ezingwevu, ezimdaka kunye nezimnyama zeSulfur ngesenzo seSulphur, i-alkali sulphides kunye nezinto ezininzi eziphilayo.