Basic aroma stone formula using PPG-2 Methyl Ether for better scent diffusion

PPG-2 Methyl Ether can be used as a volatile solvent / fragrance carrier to help the scent from aroma stone diffuse more easily, but it is not the main fixative for long wear.

For a simple prototype starting point:

• Make a premix first: Fragrance oil 80% + PPG-2 Methyl Ether 20%
• Mix until clear, then apply onto fully dried aroma stone
• Start with premix loading around 5-12% of dry stone weight
  Example: dry stone 100 g, try premix 5-12 g

If you want stronger throw:

• Try Fragrance oil 70% + PPG-2 Methyl Ether 30%
• This can help heavier or harder-to-diffuse scents, but if used too high the scent may come out fast, fade faster, or leave an oily surface

If you want longer-lasting scent:

• Lower PPG-2 Methyl Ether to about 10-15% in the premix
• A practical starting point is Fragrance oil 85-90% + PPG-2 Methyl Ether 10-15%
• For better longevity, the adjustment should come from a slower-evaporating fixative / co-solvent approach in the fragrance system, rather than increasing this volatile solvent

Recommended process:

1. Dry or rest the stone completely for 24-48 hours before adding scent
2. Prepare the fragrance + PPG-2 Methyl Ether premix until clear
3. Add in several small rounds instead of one heavy pour
4. Rest in a closed container for 12-24 hours so the scent distributes more evenly
5. Air briefly before packing to reduce the initial solvent note

Important check:

• If the premix has not fully absorbed within 12-24 hours or leaves oily residue on the surface, the stone is likely above its absorption capacity, or the solvent/fragrance ratio is not suitable
• In that case, reduce the premix amount per piece and/or reassess stone porosity/capacity and the premix ratio

Important note:

• PPG-2 Methyl Ether helps dissolve/dilute the fragrance in the premix, but the aroma stone itself does not dissolve the fragrance. Diffusion depends on the stone porosity, how dry the stone is, and how much premix the stone can hold.
• The catalog usage range for this material is 0.1-50%, but for aroma stone these ratios should be treated as trial starting points only, then adjusted with the actual fragrance oil and actual stone type.

If you want, you can send the type of stone you use (gypsum / plaster / cement / porous ceramic) and your current fragrance percentage, and we can help narrow the ratio further.