These very heavy lined draperies and matching top treatment really drank up the dry clean solution.
The main ingredient in dry clean solution is a solvent that can best be described as mineral spirits, subjected to several more levels of refinement. As such, it is a petroleum derivative, and therefore much more expensive than the distilled water used for wet cleaning.
Interestingly, while the cost of gasoline has dropped by up to $2.00 a gallon in the year preceding this writing, dry clean solution has remained pretty much steady. Primarily because the main costs are associated with the comprehensive refinement process, as well as special cleaning agent additives. For these reasons, a dry cleaning project can end up costing half again as much as a wet cleaning project.
Coming soon, a post explaining why certain window coverings must be dry cleaned rather than wet cleaned.