MICRON SIZES
The 8 bag set contains the following bags:

• 220 micron bag | Blue | work bag
• 190 micron bag | Green | clean-up bag
• 160 micron bag | Red | contaminant removal bag (food grade/low quality)
• 120 micron bag | Orange | crystal collection bag (great quality)
• 90 micron bag | Black | crystal collection bag (incredible quality)
• 73 micron bag | Yellow | crystal collection bag (prime quality)
• 45 micron bag | White | crystal collection bag (large yield secondary grade)
• 25 micron bag | Purple | crystal collection bag (food grade/low quality)

Fresh Headies’ Bubble Bags 8 bag set contains a variety of different sized screens to separate your herbal extract according to the size of the crystals or glandular heads of the plant. You will find that having these layers will allow you to separate your herbal extract into different grades ranging from commercial grade to top quality Full Melt Bubble. The 8 bag set is the best choice for the connoisseur looking to produce a high quality herbal extract. bubble hash bags

The 190 micron bag removes contaminants from your herbal extract. The 160 micron bag, although it may contain usable herbal extract with certain strains, acts as another layer of contaminant removal. The remaining 5 bags contain your best herbal extract. Some strains or types of plants have larger crystals or glandular heads than others, so it is difficult to predict which bag will contain the best herbal extract. However, Full Melt Bubble generally is found in the 90 micron bag and the 73 micron bag. bubble hash bags

Here’s a good blog article from Pure Pressure on the subject of rating, quality and micron sizes: How Bubble Hash is Rated