Good but complex dye

The tint was done correctly on a fabric where all laundries refused to try the treatment.
Nevertheless, the execution of the operation is not ideal:
- To throw a pot and a kitchen polish.
- The smell ironing a little scary.

If the result is good, the method used does not convince me.
It was as if the fabric was dipped in tar ...

I translated the leaflet, if it helps:
Results vary depending on the subject
For Polyester and 100% nylon
For polyester and natural nylon, use idye Poly with iDye for natural material.

Note: pots and utensils used for dyeing must not be used for cooking!
Read all instructions before beginning.

All synthetic fibers are not equivalent. Results may vary dun textile to another.
Polyester is difficult to dye in water and requires a very high temperature to fix the colors; again, we only recommend to dye polyester with gas hob / cooker.

Note: The instructions below are for fixing the brightest color. For lighter shades, dissolve the powder packet in a smaller container with hot water. Add color to achieve the desired color. Keep in mind that the color depends on the time of the textile in the bath.

METHOD FOR THE CLOTHING gas cooker 100% polyester and nylon
1: fill a stainless steel or enamel with just enough water so that the material moves freely. Put "fire" on top.
2: Add the iDye Poly soluble powder "dye packet" and "Color Increase" color in the water and stir until dissolved.
3: add the pre-moistened clothes (kind rinse under water before) and boil and stir regularly between hour and 1 hour.
For a uniform color, stir all the time.
4: wash clothes with a cleanser "dry"