Question 1

Will it dye over grey? I need to update my little girls school uniform

Accepted Answer

As a general rule you need to dye to a darker shade so navy should dye a light grey.  Natural fibres such as cotton and wool are best.

Question 2

Can you dye netting I.e curtains?.

Accepted Answer

I wouldn't recommend it as most fabric dyes are only to be used with cotton items for the best results and from previous experience not recommended for polyester.

Question 3

Has anyone used this dye on canvas or hessian fabric? I was wondering if it would take well on those.

Accepted Answer

I HAVE USED DYLON DYES FOR YEARS AND HAVE ALWAYS BEEN DELIGHTED . RECENTLY I TRIED TO DYE SOME CANVAS CHAIR COVERS -THIS WAS MY FIRST DISASTER ----  THEY CAME OUT PATCHY AND SPOTTY . 
UPON FURTHER RESEARCH I DISCOVERED THAT CANVAS MATERIAL IS USUALLY 'TREATED' IN SOME WAY TO MAKE IT DURABLE --- THE 'COATING' USED TO TREAT THE MATERIAL DOES NOT TAKE DYES . THE CHAIR COVERS NOW LOOK A FORM OF 'SHABBY CHIC' .

Question 4

Can this dye remove bleach damage on navy wool cardigans

Accepted Answer

To answer the issue of heating wool, it’s  sudden changes in temperature and moving the wool around that causes felting, but don’t machine wash/dye if it’s not superwash wool, machine washable. If it’s hand wash ordinary wool, heat is ok provided it heats up gradually and is also rinsed in water the same temperature, and then cooled by just letting it sit in the final rinse till room temperature. Be gentle with it.   If you watch videos on how to dye yarn or fibre you’ll see hot water being used, but gentle transitions.

Bleach is tricky and stays in the fibre. You can neutralise it if you can get some sodium thiosulphate. Goodness knows where from!  But I remember that from school chemistry lessons!  
I doubt they put dye in the bleach, just that the bleach may cause the original colour, or the new one to “break”, or if the dye has different colours mixed together, some may be more affected by the bleach than others.

ASIN	B001FL55OO
Best Sellers Rank	461 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 1 in Fabric Dyes
Brand Name	Dylon
Colour	Navy Blue
Compatible Material	Cotton, linen & viscose. Lighter shades will be achieved on polyester/cotton & polyester/viscose mixes
Customer Reviews	4.0 4.0 out of 5 stars (20,372)
Global Trade Identification Number	05060311087560
Included Components	Dylon Hand Dye Sachet Navy
Item Form	Powder
Item Highlight	Machine Dye for Clothes, Soft Furnishings & Projects, Renew Fabrics, up to 600g of Fabric per Pod
Item Type Name	Hand Fabric Dye Sachet for Clothes & Soft Furnishings
Item Weight	50 Grams
Manufacturer	Henkel Limited
Manufacturer Part Number	0797-N
Model Number	DHS108
Number of Items	1
Number of Packs	1
UPC	050325020948 072879870084
Unit Count	1.0 count

DYLON Hand Dye, Fabric Dye Sachet for Clothes, Soft Furnishings and Projects,...

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