Jacquard Acid Dye for Wool, Silk and Other Protein Fibers, 1/2 Ounce Jar, Concentrated Powder, Emerald 629

Excellent price and quality dye which I used to dye knitting yarns. The colors are beautiful. I have used this brand for years and it is always perfect.

Review for Jacquard Acid Dye 1/2oz Jar Navy Blue - Acid Dye. Worked beautifully! I used 4 liters of water, 200 ml of vinegar, and 2 tablespoons of dry color powder for a weight of 350 g (dry fabric of a dust white 100% linen dress). Using gloves, I wetted the dress in warm water and immersed it in the pan, brought the water to 180F, added the vinegar and stirred for 30 minutes. Put a stone on top of the fabric to keep it submerged. Let it cool. Rinsed the dress with cold water till the color stopped bleeding out. See the pictures for details. I turned a bit lighter than expected, but I am pleased with the color. It dyed evenly, and it also stained the buttons, changing them from brown to a dark blue as a bonus. It did not smell. I hand-washed the dress once in cold water, and it did not bleed. I am very pleased. Kept the blue solution to dye a white natural wool, and I will see if it will still work, as stated.

I never write reviews but the color was accurate and now instead of a dowdy grey cashmere sweater I have a vibrant green sweater. Easy and simple process.

Works great! I bought this to freshen up the color on a pair of navy blue silk pants I've had for a few years that had gotten very faded. They look new again!

This was the first time I ever dyed clothing (stove top method) and it worked fantastically! The color was very deep-- definitely a jet black. The dye was even throughout the garment, too. The colors have not faded at all since I dyed the garments a year ago-- they're still jet black! On that note, do be cautious that the colors will run onto other clothes for the first several washings... similarly, expect that it might tint/stain your skin in high-friction areas (like under arms) until it has been washed several times. I dyed two Smart Wool pullovers from purple to black, and three light-weight wool pullovers with hoods from light grey to black. I probably could have dyed even more...!

I have a front loading machine so I could not adjust the amount of water. I think with less water, I would have gotten more color and the product would have gotten another star. All things considered, a very good result.

They do not provide ANY information with the item on how to use their dye or even quantity of dye to use. You must go online and do a search for it. Once you find it be aware there are ONLY instructions are for the washing machine method, NO QUANTITY OF DYE to use doing the stovetop method. Mind you, one MUST use the stovetop method when dying wool or cashmere. After figuring out a method of translating their weight & percentage formula to ounces, and then to teaspoons, I used the dye to very slowly and carefully dye my cashmere. The result was spectacular. It's worth it to go with a true acid dye for protein fiber... which is something I didn't know a thing about prior to researching dying cashmere.

Great value for plenty of dye powder that will last a long time. Beautiful color that mixes well with other colors (I purchased 4 primaries for mixing). So far I have dyed about 7 pounds of wool (roving and felt) and have barely made a dent in this container. I highly recommend jacquard acid dyes.