NYLOFIX-993 | Acid Stable Polyamide Dye Fixing Agent

Product Information

Nylofix-993 is a low dusting powder dyefixing agent for polyamide and their blends dyed/printed with acid and metal complex dyestuffs. It is readily soluble in water. Polyamide fabric dyefixed with Nylofix-993 shows improvement in wet fastness properties. It acts as a leveling agent for Nylon/Wool blend for achieving solid even dyeing. It also acts a reserving agent for Nylon/cotton blend fabrics. Nylofix-993 is stable under acidic condition this can be used for various application.  

Key Features & Benefits

Key Features Benefits
Fibre Affinity
Strong dye fixing agent for acid and metal complex dyes and reserving agent for Polyamide/Cellulosic blends dyeing
Improves the wet fastness properties
Prevents cross-staining during washing
It equalize exhaustion of dye for wool/nylon blend
Solid shades obtained
Has no effect on shade or light fastness of dyeings
Recipe adjustment not require
Low foaming
Can be used on soft flow machines


General Characteristics
Physical appearance
Light brown/brown buff powder
Ionic Nature
pH of 1% solution
8 +/- 1
Miscible in water
Compatible with anionic and nonionic products
Stable to dilute acids and dilute alkalies


I. Exhaust application to improve wet fastness of Polyamide 

0.5-1.5% (depending on depth of shade)
Bath pH
2.5-3 (with Citric acid)
Bath Temp.
70-80 deg. C
15-20 min.

II. Exhaust application for Wool / Nylon blend for solid shade 

Nylofix-993 is added to the bath containing approximately 2g/l Citric acid and other auxiliaries. Treatment to be carried out for 20 min at 50-60 deg. C before adding dye and then dyeing to be carried out. The concentration of Nylofix-993 depends on type of dye and depth of shade, dyeing method and fibre blends. Generally, more quantity of Nylofix-993 is required for high dye affinity and pale shades and less quantity is required for darker shades.

 III. Exhaust application for Nylon / Cellulose blend for solid shade 

Nylofix-993 is added to the dyebath to prevent staining of nylon fibre with direct dyes depending on the depth of shade.

Note: ----- 1. The handle of the fabrics may change slightly (becoming firmer,fuller), depending on the amount of Nylofix-993 used, the fabric construction, and the temperature during drying or post-setting. 

2. The optimum concentration of Nylofix-993 can vary depending on type of polyamide. Generally, higher concentration are required for Nylon 6 than for Nylon 66. It is advisable to carry out the after treatment at 70 deg. C 

The effects obtained by after treating with Nylofix-993 are stable to dry heat at the usual setting temperatures, but can be impaired by intense pressure steaming. Increasing the amount of Nylofix-993 will often improve the stability of the dyefixation to steaming. Polyamide material treated with Nylofix-993 is difficult to re-dye or over-dye. Nylofix-993 should therefore be stripped first before re-dyeing.

Removal of Nylofix-993 from substrate 

2 g/l ammonia 24% 

2-3 g/l detergent 

Run for 10-20 minutes at 80-90 deg. C followed by rinsing.

Instructions For Dilution

Procedure to prepare 35% Nylofix-993 

- Take 65 parts of DM water at room temperature or 60-80 deg. C 

- To this, gradually add 35 parts of Nylofix-993 with constant stirring. 

- Continue stirring for 30 min to obtain homogeneous product.


- Appearance of solution may change from yellow to brown on storage

- If solution to be stored at freezing temperature, then addition of 5-10% diethylene glycol is recommended  


It is recommended to add 0.1% Bronopol (2-Bromo, 2-nitropropane, Paraben (methyl para hydroxy benzoate) as an antimicrobial agent to avoid fungal/microbial growth. 

It is advisable to utilize the diluted product within 2 months. Stir well before use.



Storage : Store in cool, ventilated shed away from heat and direct sunlight. Storage temperature should not exceed 35 deg C. lose lids firmly to avoid contact with air and moisture. 

Shelf Life : 9 months from the date of manufacturing, if stored under controlled conditions.

The above information is given in good faith and is without warranty