Leather Wet End Processing Chemicals

DYE FIXING AGENT
AMARLIX DFA LIQUID is highly effective for improving wet and perspiration fastness of suedes and gloving leathers dyed with Acid, Direct dyes

Characteristics Appearance : Colourless to straw colour liquid Chemical Composition : Cationic pH of 5% Solution : 5 - 6 Solubility : Miscible with water in all proportions

Stability And Compatibility

• Stable to Acids and salts. With Alkalis it has limited stability.
• Compatibe with Non-ionics and Cationics but may ppt. with Anionics.
• Good Shelf life under normal storage conditions but care should be taken to store it away from heat.

Application
As After - treatment
Wet fastness of suede leather dyed with Acid / Direct dyes can be improved by after treating with

• 1.5 % (on Shaved Wt.) or
• 3 % Amarlix DFA (on Dry Wt.)

Glossy finish on Suede, Gloving Leathers can be enhanced by spraying 10% Solution of AMARLIX DFA
Care should be taken to see that the spraying is avoided with leathers finished with Anionrc finish which may adversely affect the top finish.

DYE PENETRATING AGENT
AMARLIX AG LIQUID is a non-ionic solvent used for incresing the solubility of water soluble and solvent soluble dyes to ensure uniform dyeing with deeper penetration of dye in spray or drum dyeing of leather.

Characteristics Appearance : Colourless liquid Chemical Composition : Non - ionic pH in 5% solution : 6 - 7

Solubility And Compatibility

• Stable to Acids, Hard water and Salts
• Good Shelf life
• Compatible with Non-ionics, Anionics and Cationics

Applications
In Drum Dyeing Paste the dye (Anionic, Cationic or Metal Complex dyes) with equal quantity of AMARLIX AG and then add boiling water till the dye is completely dissolved.

The mixture can then be added to the drum and dyeing to be continued as usual.

AMARLIX AG can be used in fatliquoring to give better Penetration and more softness to leather.

Masking Agent For Chrome Tannage

CHEMICAL COMPOSITION

• Neutralized mixture of aromatic and aliphatic dicarboxylic Acids

Characteristics Appearance : Clear light yellow thin liquid pH : 6 to 7 Concentration : 25% {±2%)

Properties

• Produces leather of improved fullness.
• More concentrated dyeing obtained.
• Improves fullness, dyeing property.
• Good fastness to perspiration of leathers in the chrome tannage.
• Have no corrosive effect on metal accessories.

Use

• Applied whenever the filling and complex forming properties of the product are desirable.
• for thin material like willow calf, willow sides and suede leather.
• With large quantity special effects can be developed in suede leathers

A pretanning syntan for vegetable tanned leather and a retanning syntan for chrome and combination tanned leather.

CHEMICAL COMPOSITION
Pheol condensation Product.

APPFARANCE : A pale brown spray dried powder readily soluble in water.

Properties

• During pretanning operation, it pretans readily and promotes throuqh and through penetration of vegetable tannins leading to a liqht, smooth, undrawn grain and an attractive pale leather colour.
• It assists to reduce sludge formation in vegetable tan liquor.
• On the retannage of chrome and semi chrome leathers, it imparts firmness, smoothness, tightness and resillience to the grain, besides good buffing properties.
• In the retannage of chrome leathers. It is used For improving the exhaustion of retanning and fatliquoring baths.

Application

• In pretanning with rapid vegetable tanning for bag and upholstery leather as well as E.I. leathers.
• In removal of iron stains in E.I. to semi chrome leathers as well as adjusting the acidity level of tan liquors in pit tanning system.
• As a combination tanning agent by replacing upto 20% of the pure tan used in retanning by ARITAN P
• Retannage of chrome and semi chrome leathers

A light fast combination tanning agent with buffering and complex forming properties

CHEMICAL COMPOSITION
Basic chromium sulphate and synthetic tanning agent.

APPEARANCE : A pale green colour powder readily soluble in water.

Properties

• Used for the production of leathers with mellowness and supple grain without altering the chrome leather character.
• Retains the fineness and tightness of grain and prepares the leather for level dyeing.
• Has complex forming and buffering properties.
• Recommended for neutralization and retanning of chrome and combination tanned leathers.
• It is non-astringent and also useful for fixation following retanning dyeing and fatliquoring.
• Used alone gives a very light coloured soft leather.
• Promotes softness, dyeability and buffing when used to retan suedes.
• Used for retanning of E.I. Tanned leathers and chromes tanned leathers.
• A pre-tanning agent, it effects rapid penetration of vegetable tannis.

Application

• Retanning of soft uppers, aniline softies, vegetable tanned, gloving and clothing leathers suedes, nubuck and hunting suedes,
• Self tannage for linning from sides.
• Retannage of chrome and e.i. Leather.

A light fast neutralizing syntan with pronounced buffering effect and complex forming action.

Chemical Composition
Auxiliary neutralizing syntan based on naphthalene sulphonic acid condensate.

Characteristics Appearance : Light cream coloured powder Concentration : 95% (min.) pH : (1:10) : 7.0

Properties

• Being anionic and having neutal pH, it neutralizes the cationic chrome and mineral tanned leathers.
• With buffering and complex forming action, it neutralizes uniformly the surface and the cross section of leather leading to a very great levelling action and imporved penetration of anionic products including anionic dyes.
• No tanning action on the grain of leather leading to no coarseing of the grain.
• Helps to disperse the tannis, distributing them more evenly in the leather.

Application

• Used either alone (1-3% on shaved weight) or in combination with common commercial neutralizing agents like sodium bicarbonate, sodium formate etc.
• Highly suitable for initiating the retannage when used alone or in combination with other retanning agents.
• Used after a chrome or zirconium tannage, for example on box calf and napps.
• Provides level dyeing with only minimal shade weakening effect by preventing the spontaneous reaction of anionic dyes with cationic charged leather i.e chrome leather,

An auxiliary syntan for dye levelling, neutralization, retanning and for the dispersion of vegetable tannis.

Chemical Composition
Auxiliary dye levelling syntan based on naphthalene sulphonic acid condensate

Characteristics Appearance : Light, yellowish brown powder Concentration : 95 % (min.J pH (1:10) : 6-7

Properties

• Being anionic in nature, it reduces the rate of uptake of anionic dyes leading to outstanding levelness and helps to penetrate anionic product such as syntans, fatliquors and vegetable tans.
• With its dispersinq action, it promotes an even distribution of tanning agents and in combination with syntans and or vegetable tannis, it is helpful retannage.
• It neutralises the mineral tanned leathers due to its anionic character and neutral pH
• Acting as a mordant for basic dyes.

Application
Levelling Agent for uniform dyeing : 0.5 to 2 %
Neutralization : 1.5 to 2.5 %
Retanning: After neutralization 2-3% (on shaved weight) along with other
syntans and vegetable tannis for retanning of leathers.
Dispersing agent for vegetable tannis : - 2 to 3 %

• RETANNING RESIN

Chemical Composition
Acrylic interpolymer

Characteristics Appearance : amber-coloured, thick liquid Active substance : 25-30% pH in 10% sol : 6 ionic charge : anionic compatibility : sensitive to pH3 light-fastness : good

Properties
ARITAN RF has the same characteristics as ARITAN RF, But the change on the polymeric tanning agent in the formula provides more gummy and fuller leathers with finer Grain.

ARITAN RF is light-fast and can be used to obtain white leathers.

• RETANNING RESIN

Chemical Composition
Acrylic interpolymer

Characteristics Appearance : amber-coloured, thick liquid Active substance : 25-30% pH in 10% sol. : 6 ionic charge : anionic compatibility : sensitive to pH3 free monomer : less than 0.1 light-fastness : Good solvent resistance : Good

Properties
ARITAN RE is a special retanning agent for chrome leathers. Its special retanning action allows to achieve full leathers, without Modifying their grain Fineness.

It is viscous but easily pourable and dilutable by adding warm Water. Th product is sensitive to acids and can percipiate with pH Valueslower than 3; it's only partially mixable with cationic Products ( for example: mineral tanning agents}. ARITAN RE Can be used with synthetic and vegetable tanning agent Fatliquors, sulphited products, anionic dyestuffs and other anion- Active products in the usual concentration, provided that pH does not decrease under the above said limit.

In retanning, ARITAN RE provides fullness without affecting Grain fineness and firmness, moreover the typical aspect of chrome Leather remain unchanged, though some synthetic vegetable Retanning agents are still necessary.

ARITAN RE is light-fast and offers even and slightly lighter dyes. In case of light-colored leathers, together with white tanning Agents, you will obtain an even higher white degree.

ARITAN AFB liquid is a anionic retanning agent for chrome feather.

CHEMICAL COMPOSITION
Replacement syntan based on napthalene sulphonic acid condensate.

Characteristics Appearance : Dark Brown colour liquid pH (10% solution) : 3.5 + 0.5 Solid content : 35% + 3%

Stability And Compatibility

• Stable to Acids & Salts
• Good Shelf life
• Compatible with non-ionics, Anionics and to some extent cationics ARITAN AFB liquid is a versatile tanning and retanning agent which is compatible with other tanning materials whereby neutralisation and retannage can take place in same bath. It promotes firmness of the grain and penetrates through the leather quickly and deeply it also favours uniform distribution of the fat liquoring agents and helps fo impart good softness with minimum quality of fat liquor.

Advantages

• Low astrigency and therefore formation of Fine again.
• Neutralisation and retannage may take place in the same bath.
• Good filling effect.
• Homogenous distribution and absorption of fat and chrome tanning materials as well as AMARTAN LSI and AMARTAN GSI
• Good compatibility with synthetic, Vegetable and chrome tanning materials as well as AMARTAN LSI and AMARTAN GSl