How to deal with the discoloration problem of compound fertilizers?
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To enhance the appeal of compound fertilizers, they are often dyed, but over time the color can fade, or different batches may have different colors. Can anyone with expertise solve this problem?
There’s no good solution; either don’t use food-grade dyes and opt for industrial-grade ones instead.
Heroes see things alike; we also plan to do the same.
There’s no good solution – the colors of the raw materials vary, there’s also recycled material, and issues with moisture content, etc
We’re also very troubled by this issue; there’s no good solution at the moment.
The effect of the coating oil is significant; at the same time, the dye must remain colorfast under sunlight, and it’s best to use opaque packaging bags
Where do you get your dyes from? We would like to give it a try too.
Which dye do you use?
Are there any disadvantages to using industrial-grade dyes?
Industrial-grade pigments have a high lead content and are dangerous.