The basic formulation is: The first three ingredients are heated together, then added to the cold solvent and allowed to cool while constantly stirring.
[3][4] Care should be exercised, as the solvents are highly flammable and have low boiling points.
[5] The cedarwood oil acts as a fungicide to further protect the leather.
Other steps entailed cleaning the leather, if necessary with soap and water, and applying an aqueous solution of 7% potassium lactate as a buffer.
A warning was given about the dangers of using too much lactate, which made books sticky and could cause fungal growth.