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Acid Dyes


Acid dyes are water soluble anionic dyes that are applied to fibres such as silk, wool, nylon and modified acrylic fibres from neutral to acid dye baths. Attachment to the fibre is attributed, at least partly, to salt formation between anionic groups in the dyes and cationic groups in the fibre. Water soluable Acid dyes are not substantive to cellulosic fibres. Acid dyes are used both commercially and by the studio dyer to dye protein/animal fibers such as wool, silk, mohair, angora, alpaca and some nylons and synthetics. Acid dyes require the use of an acid such as vinegar, acetic or sulphuric acid to set the colour.

Acid dyes sound scary to some novices, who imagine that the dyes themselves are caustic strong acids. In fact, the dyes are non-caustic, are in many cases non-toxic, and are named for the mild acid (such as vinegar) used in the dyeing process, and for the types of bonds they form to the fiber. Some of them are significantly more toxic than fiber reactive dyes, while others are even safe enough to eat, and are sold as food coloring.

Acid dyes fall into several classes:

1. Leveling acid or strong acid dye,

2. Milling or weak acid dyes, and

3. Super milling or fast acid or neutral acid dyes.


They are also the acid dye component of all-purpose or union dyes such as Rit and Tintex, says Knutson. It's difficult now to find out which specific acid dyes fall into which of these dye classes, however. At least part of the reason is that the information is not particularly useful to the dyer.


Most histologic dyes are classified either as acid or as basic dyes. An acid dye exists as an anion (negatively charged) in solution, while a basic dye exists as a cation (positive charge). For instance, in the hematoxylin-eosin stain (H&E), the hematoxylin-metal complex acts as a basic dye. The eosin acts as an acid dye. A very large class of dyes containing acidic groups, such as the sodium salts of sulfonic acids or phenolic groups. They are more soluble and have less tinctorial value than basic dyes but they also have greater light fastness. They do not form lakes with tannin. Acid dyes are used in dyeing leather, paper, etc., and their particular value lies in their ability to produce brighter, more uniform colours. They are normally applied from an acid dye liquor (acetic, formic, or sulphuric acid); however, unless applied from a neutral or only slightly acid dyebath, i.e., pH of 6.0 to 7.0, their use is likely to result in acid degradation of the material dyed.
Acid Dyes

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ACID YELLOW DYES
PRODUCT NAME C.I. GENERIC NAME PRODUCT NAME C.I. GENERIC NAME
ACID QUINOLONE YELLOW 3GXACID YELLOW 3ACID YELLOW 5GNACID YELLOW 110
ACID LIGHT YELLOW 2GXACID YELLOW 1ACID YELLOW GLXACID YELLOW 114
ACID TARTARZINE ARXACID YELLOW 23ACID YELLOW NWXACID YELLOW 151
ACID YELLOW 3GLACID YELLOW 34ACID YELLOW PGRACID YELLOW 186
ACID METANIL YELLOW MSACID YELLOW 36ACID YELLOW M3RLACID YELLOW 194
ACID MILING FAST YELLOW MRACID YELLOW 42ACID YELLOW A4RACID YELLOW 199
ACID YELLOW FGXACID YELLOW 4ACID YELLOW M5RLACID YELLOW 204
ACID FLORCSCEINE URANINEACID YELLOW 73ACID YELLOW 2RXACID YELLOW 220
ACID YELLOW GRACID YELLOW 99

ACID ORANGE DYES
PRODUCT NAMEC.I. GENERIC NAMEPRODUCT NAMEC.I. GENERIC NAME
ACID FUR YELLOW AEXACID ORANGE 3ACID ORANGE N3RLACID ORANGE 67
ACID ORANGE 11ACID ORANGE 7ACID ORANGEACID ORANGE 7
ACID ORANGE GRXACID ORANGE 10ACID YELLOW RLACID ORANGE 80
ACID ORANGE RGNACID ORANGE 24ACID ORANGE RLACID ORANGE 86
ACID ORANGE 2RACID ORANGE 33ACID ORANGE MRLACID ORANGE 142
ACID ORANGE SGACID ORANGE 56ACID ORANGE 3GXACID ORANGE 156
ACID ORANGE 2RLACID ORANGE 60ACID ORANGE 116

ACID VIOLET DYES
PRODUCT NAMEC.I. GENERIC NAMEPRODUCT NAMEC.I. GENERIC NAME
ACID VIOLET RLXACID VIOLET 1ACID BRILLIANT RED 10ACID VIOLET 54
ACID VIOLET CARMINE 4BACID VIOLET 1ACID BORDEAUX MBACID VIOLET 90
ACID VIOLET 4BSACID VIOLET 17ACID VIOLET RLACID VIOLET 9
ACID VIOLET 6BACID VIOLET 49LETHER VIOLET RACID VIOLET 131

ACID RED DYES
PRODUCT NAMEC.I. GENERIC NAMEPRODUCT NAMEC.I. GENERIC NAME
ACID ROSE RED 2GACID RED 1ACID RED F2RACID RED 151
ACID CARMOISINE APXACID RED 14ACID BORDEAUX RLXACID RED 182
ACID SCARLET 3RACID RED 18ACID RED GRACID RED 183
ACID FUCHSINE SXACID RED 33ACID RED BROWN NSACID RED 184
ACID RED NBACID RED 34ACID PINK BACID RED 186
ACID RUBINE 3GXACID RED 57ACID BRILLIANT RED 2BACID RED 249
ACID FAST RED AACID RED 88ACID RED GNACID RED 337
ACID MILLING SCARLET GACID RED 97ACID RED 3GXACID RED 357
ACID BRILLIANT RED BLACID RED 106ACID RED C5RACID RED 359
ACID MILLING RED RSNBACID RED 114ACID RED BRXACID RED 362
ACID MAROON VACID RED 119ACID RED 2BXACID RED 410
ACID MILLING RED 3BNACID RED 131ACID RED BRXACID RED 426
ACID RED RSACID RED 141ACID BRILLIANT RED 4GACID RED 441

ACID BLUE DYES
PRODUCT NAME C.I. GENERIC NAME PRODUCT NAME C.I. GENERIC NAME
ACID PETANT BLUE VSACID BLUE 1ACID NAVY BLUE RACID BLUE 92
ACID PETANT BLU ASACID BLUE 7ACID FAST BLUE S5RACID BLUE 113
ACID BRILLIANT BLUE FCFACID BLUE 9ACID BLUE 2GACID BLUE 158
ACID BRILLIANT BLUE FFACID BLUE 15ACID TURQ BLUE 3GXACID BLUE 185
ACID BLUE ANXACID BLUE 25ACID BLUE MTRACID BLUE 193
ACID BLUE A2GXACID BLUE 40ACID BLUE BRLLACID BLUE 324
ACID BLUE NBLACID BLUE 80

ACID GREEN DYES
PRODUCT NAMEC.I. GENERIC NAMEPRODUCT NAMEC.I. GENERIC NAME
ACID VAPORID GREEN PXACID GREEN 1ACID LEATHER GREEN NXACID GREEN 68
ACID MILLING GREEN 6BACID GREENACID GREEN UGACID GREEN 73
ACID GREEN BLNACID GREEN 12ACID OLIVE GREEN BGLACID GREEN 104
ACID DARK GREEN BACID GREEN 20ACID GREEN BSACID GREEN 111
ACID CYANINE GREEN GACID GREEN 25ACID LEATHER GREEN WEGACID GREEN 114

ACID BLACK DYES
PRODUCT NAMEC.I. GENERIC NAMEPRODUCT NAMEC.I. GENERIC NAME
ACID BLACK 10BXACID BLACK 1ACID GREY APXACID BLACK 84
ACID FAST BLACK 2BXACID BLACK 24ACID BLACK BGLXACID BLACK 107
ACID MILLING BLACK NBACID BLACK 26ACID BLACK LDNACID BLACK 172
ACID BLACK WAACID BLACK 52ACID BLACK MSRLACID BLACK 194
ACID GREY GLAACID BLACK 58ACID BLACK MTACID BLACK 210
ACID GREY RLACID BLACK 63ACID LEATHER BLACK CBACID BLACK 234
ACID GREY AWWACID BLACK 71ACID BLACK SBXACID BLACK 235
ACID GREY CGACID BLACK 82  

ACID BROWN DYES
PRODUCT NAMEC.I. GENERIC NAMEPRODUCT NAMEC.I. GENERIC NAME
ACID BROWN RXACID BROWN 4ACID BROWN GRXACID BROWN 282
ACID BROWN 2ACID BROWNACID BROWN TPACID BRWON 28
ACID BROWN RDACID BROWN 14ACID BROWN SCACID BROWN 32
ACID BROWN 2RACID BROWN 15ACID DARK BROWN JBXACID BROWN 342
ACID BROWN 2RLACID BROWN 45ACID BROWN SRXACID BROWN 348
ACID DARK BROWN 5RACID BROWN 48ACID BROWN GSXACID BROWN 349
ACID BROWN DSACID BROWN 58ACID BROWN S3RXACID BROWN 354
ACID BROWN CRACID BROWN 75ACID BROWN MBLXACID BROWN 355
ACID BROWN 4BXACID BROWN 78ACID BROWN P3ACID BROWN 36
ACID BROWN CGXACID BROWN 83ACID BROWN M2RLACID BROWN 365
ACID BROWN CTXACID BROWN 85ACID OLIVE BROWNACID BRWON 36
ACID BROWN MFXACID BROWN 97ACID BROWN SGLACID BROWN 402
ACID BROWN 5GXACID BROWN 98ACID BROWN SRLACID BROWN 41
ACID BROWN ORGACID BROWN 100ACID BROWN LN2RACID BROWN 41
ACID BROWN WRACID BROWN 106ACID BROWN PHACID BROWN 418
ACID BROWN DACID BROWN 12ACID BROWN RLACID BROWN 420
ACID DARK BROWNACID BROWN 12ACID CAMEL BROWN APXACID BROWN 422
ACID BROWN GBXACID BROWN 161ACID HAVANA BROWN 2RLXACID BROWN 425
ACID BROWN NTXACID BROWN 165ACID BROWN WGACID BROWN 432
ACID BROWN HHKACID BROWN 188ACID BROWN PRGACID BROWN 434
ACID BROWN DACID BROWN 191ACID DARK BROWNACID BROWN 44
ACID BROWN RGXACID BROWN 214ACID BROWN 5GXACID BROWN 452
ACID BROWN XNACID BROWN 23ACID BEIGE APACID BEIGE
ACID BROWN GNACID BROWN 264ACID BEIGE APACID BEIGE O

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