3 Advantages of Using Mineral Spirits over Paint Thinner

Mineral spirits are a type of solvent typically used for cleaning tools and machinery that tend to build up grease and grime. They will also thin oil-based materials, such as paints and varnishes. There are several advantages of using mineral spirits over traditional paint thinner, though the differences are fairly subtle. Paint thinner is mineral spirits, in a less refined form and contains other types of solvents. “Washed” mineral spirits generally costs a good deal more, but are preferable depending on their use.

The Odor of Mineral Spirits

Paint thinner is noxious stuff. The vapors are enough to lay you out. Indeed, you need to take care not in inhale too much, as it can cause all manner of nasty side effects, including death. Because paint thinner contains various solvents, this gives it more extreme noxiousness. "Washed" mineral spirits have a much lower odor factor, and are much easier to use for many people due to this.
TIP: Doityourself’s painting consultant Pam Estabrooke, of ProTect Painters, reminds you, “It is very important to always use solvents in a well ventilated room.  If you begin to feel light headed or develop a headache, immediately remove yourself from the room and get some fresh air.” 

Cost of Paint Thinner vs. Mineral Spirits

Usually, paint thinner is cheaper to purchase by a pretty good amount. Mineral spirits can be up to double the cost. The reason for this is mineral spirits receives more thorough refinement. This cleaning of the material also is what makes it less noxious to use. The bottom line is that it takes more work to produce mineral spirits than paint thinner, and you get what you pay for.

Effectiveness of Paint Thinner vs. Mineral Spirits

Mineral spirits tends to be more effective in terms of solvent properties and cleaning capabilities. This is due to the fact that it is a much more purified form than paint thinner. Many artists prefer mineral spirits due to the substance's ability to quickly clean about any painting utensil they might use. It is also a more effective solvent, and is the preferable thinning fluid. Because it is more effective overall, that can make up for the difference in cost compared to paint thinner.
TIP: Pam says, “Use a non-reactive container to clean brushes in (glass or stainless steel). Always store leftover solvent in a tightly closed container.  Do not pour used product down a drain or dump it out onto the ground.  Seek out a reputable recycling center to dispose of waste.”