Mario Badescu Drying Lotion Formulation Adjustment

Based on the formula you found and inquired about, some ingredients can be replaced with products available at MySkinRecipes store.

Ingredients That Can Be Replaced with Store Products

• Colloidal Sulfur: You can use Nano Sulfur (Colloidal Sulfur Dispersion, Nano Particle Size) (ID 35951). Nano Sulfur has similar acne-fighting properties to regular Colloidal Sulfur, including antibacterial action, reducing inflammation, and controlling oil.
• Salicylic Acid: You can use Salicylic Acid (BHA) (ID 148), which is high-purity Salicylic Acid. Salicylic Acid is a key ingredient for dissolving clogged pores and exfoliating skin cells.
• Glycerine: You can use Glycerin (USP/Food Grade) (ID 143). Glycerin acts as a humectant and helps dissolve some ingredients in the formula.
• Zinc Oxide: You can use Zinc Oxide (Micronized) (ID 292) or other types of Zinc Oxide available in the store. Zinc Oxide helps reduce inflammation, control oil, and promote healing of acne lesions.
• Titanium Dioxide: You can use Titanium Dioxide 250nm Pigment (Non-Treated) (ID 295) or other types of Titanium Dioxide available in the store. Titanium Dioxide acts as a white pigment for coverage and offers minor UV reflection.
• Talc: You can use Talc Powder (Non-Coated, 325 Mesh, >90% Whiteness) (ID 9191) or other types of Talc. Talc is a main component of the powder base, helping with texture and oil absorption.

Ingredients That May Need to Be Sourced Elsewhere

• Isopropyl Alcohol: Based on the search, Isopropyl Alcohol is not directly available in the store. You may need to source it from elsewhere.
• Water: This is a basic ingredient. You can use clean water suitable for cosmetic use.
• Calamine: Based on the search, Calamine is not directly available in the store. As suggested by cosmeceutical7, you might be able to use ready-made Calamine Lotion from a pharmacy as a component.
• Camphor: Based on the search, Camphor is not directly available in the store.

Ingredient Percentages

The percentages you proposed (Isopropyl Alcohol 40%, Water 25%, Calamine 20%, Camphor 5%, Colloidal Sulfur 3%, Salicylic Acid 2%, Glycerine 2%, Zinc Oxide 1%, Titanium Dioxide 1%, Talc 1%) are a good starting point and are feasible.

However, to achieve the characteristic two-layer texture with the powder sediment at the bottom and the clear liquid layer on top, similar to the original product, experimentation with the percentages is necessary.

• Liquid Phase: The main components are Isopropyl Alcohol and Water, along with Glycerine and Salicylic Acid dissolved in this layer. The ratio of Isopropyl Alcohol to Water will affect the solubility of Salicylic Acid and how quickly the product dries on the skin.
• Powder Sediment Phase: The main components are Calamine, Colloidal Sulfur, Zinc Oxide, Titanium Dioxide, and Talc. The total percentage of these ingredients will affect the amount of sediment in the bottle and the consistency of the powder you scoop out with a cotton bud.

You can start with your proposed percentages and gradually adjust the amounts of the powder ingredients (Calamine, Sulfur, Zinc Oxide, Titanium Dioxide, Talc) to get the desired amount of sediment. Also, adjust the ratio of Isopropyl Alcohol and Water in the liquid phase to achieve the appropriate feel and solubility.

Making a small test batch first will help you adjust the formula more easily until you achieve the desired product texture.