ramportin1
Sickest member here
A really good read on mixing ratio for a affective AND SAFE IPA wipedown with knowledge from chemists, as many people mix it WAY to strong or just simply use it straight out of the bottle. This is from autogeek:
How to Mix IPA for Inspecting Correction Results
Here are the easiest ways to mix an approximate 10% solution for the most popular concentrations of Isopropyl Alcohol available at the retail level.
91% IPA
To mix a 32 ounce Spray Bottle
Pour 4 ounces or ¼ of a 16 ounce bottle of 91% IPA into a 32 ounce spray bottle and top the rest of the bottle off with water. This will make 32 ounces at 11.375% IPA to Water solution.
70% IPA
To mix a 32 ounce Spray Bottle
8 ounces (or ½ of a 16 ounce bottle) will make 32 ounce of 17.5% IPA to Water solution. Get a 32 ounce container, pour in 8 ounces, (or ½ of a 16 ounce bottle) of the 70% IPA and then fill the rest of the container up with water and you get 32 ounces of 17.5% IPA to Water solution.
50% IPA
To mix a 32 ounce Spray Bottle
8 ounces, (or ½ of a 16 ounce bottle) will make 32 ounces of 12.5% IPA to Water solution. Get a 32 ounce container and pour in 8 ounces, (or ½ of a 16 ounce bottle) of the 50% IPA then fill the container up with water and you get 32 ounces of 12.5% solution.
Why dilute concentrated IPA to an approximate 10% IPA to Water Solution
The most common dilution levels you can purchase over the counter are 70% and 91% Isopropyl Alcohol, sometimes you can find 50% version. At the time I'm writing this article, there are no other articles on this topic to give people a general guideline as to how to dilute and use Isopropyl Alcohol to chemically strip paint. I actually made a post to an AG forum thread where I encouraged someone else to write this article, but to date there's been no takers, so here's my offering.
Most of what I've read are forum members recommending one of two options,
Dilute IPA by 50% with water or 1:1
Use it straight out of the bottle
Most recommendations I’ve read from Anonymous Forum Members, (posting under Nicknames, not their real names that would tie them to their words and their reputations), are:
Dilute IPA by 50% with water or 1:1
Diluting 91% IPA 1:1 or by 50% with water would give you approximately a 45% dilution of IPA to water solution.
Diluting 70% IPA 1:1 or by 50% with water would give you approximately a 35% dilution of IPA to water solution.
Diluting 50% IPA 1:1 or by 50% with water would give you approximately a 25% dilution of IPA to water solution.
After talking to my chemist friends, they all felt that these dilution levels were overkill and too strong for removing residues after compounding and/or polishing paint. Most quality name brand compounds and polishes are water soluble and don't need a strong solution of Isopropyl Alcohol to dissolve, emulsify and loosen any leftover residues on the surface.
Their recommendation was for approximately a 10% dilution of IPA to water solution. The reason for this recommendation besides their chemistry background, is that a strong solution of IPA can stain and even soften some clear coat paints.
High Solids Clear Coats paints are "Alcohol Friendly", meaning products like Isopropyl Alcohol, can and will penetrated into, soften, wrinkle and/or stain the paint. To avoid any of these problems, a 10% dilution of IPA to water solution is recommended and adequate to remove any compounding and polishing residues without risking any danger to your car's paint or your customer's car's paint.
Another colleague in the industry coined the term Hot to describe strong solutions of Isopropyl Alcohol used to chemically strip paint.
Hot = How fast a liquid will bite into the paint, the strength of the dilution and the flash time for the liquid to evaporate off the finish.
Full strength IPA is a HOT chemical stripper, the stronger the ratio, the hotter it is.
My colleague agrees with my chemist friends that 50%, 70% and 91% dilution levels are all too strong to safely use to chemically strip paint. This person's recommendation was to stay at or below 25% dilution of IPA to water solution.
Sent from my SAMSUNG-SM-G935A using Tapatalk
How to Mix IPA for Inspecting Correction Results
Here are the easiest ways to mix an approximate 10% solution for the most popular concentrations of Isopropyl Alcohol available at the retail level.
91% IPA
To mix a 32 ounce Spray Bottle
Pour 4 ounces or ¼ of a 16 ounce bottle of 91% IPA into a 32 ounce spray bottle and top the rest of the bottle off with water. This will make 32 ounces at 11.375% IPA to Water solution.
70% IPA
To mix a 32 ounce Spray Bottle
8 ounces (or ½ of a 16 ounce bottle) will make 32 ounce of 17.5% IPA to Water solution. Get a 32 ounce container, pour in 8 ounces, (or ½ of a 16 ounce bottle) of the 70% IPA and then fill the rest of the container up with water and you get 32 ounces of 17.5% IPA to Water solution.
50% IPA
To mix a 32 ounce Spray Bottle
8 ounces, (or ½ of a 16 ounce bottle) will make 32 ounces of 12.5% IPA to Water solution. Get a 32 ounce container and pour in 8 ounces, (or ½ of a 16 ounce bottle) of the 50% IPA then fill the container up with water and you get 32 ounces of 12.5% solution.
Why dilute concentrated IPA to an approximate 10% IPA to Water Solution
The most common dilution levels you can purchase over the counter are 70% and 91% Isopropyl Alcohol, sometimes you can find 50% version. At the time I'm writing this article, there are no other articles on this topic to give people a general guideline as to how to dilute and use Isopropyl Alcohol to chemically strip paint. I actually made a post to an AG forum thread where I encouraged someone else to write this article, but to date there's been no takers, so here's my offering.
Most of what I've read are forum members recommending one of two options,
Dilute IPA by 50% with water or 1:1
Use it straight out of the bottle
Most recommendations I’ve read from Anonymous Forum Members, (posting under Nicknames, not their real names that would tie them to their words and their reputations), are:
Dilute IPA by 50% with water or 1:1
Diluting 91% IPA 1:1 or by 50% with water would give you approximately a 45% dilution of IPA to water solution.
Diluting 70% IPA 1:1 or by 50% with water would give you approximately a 35% dilution of IPA to water solution.
Diluting 50% IPA 1:1 or by 50% with water would give you approximately a 25% dilution of IPA to water solution.
After talking to my chemist friends, they all felt that these dilution levels were overkill and too strong for removing residues after compounding and/or polishing paint. Most quality name brand compounds and polishes are water soluble and don't need a strong solution of Isopropyl Alcohol to dissolve, emulsify and loosen any leftover residues on the surface.
Their recommendation was for approximately a 10% dilution of IPA to water solution. The reason for this recommendation besides their chemistry background, is that a strong solution of IPA can stain and even soften some clear coat paints.
High Solids Clear Coats paints are "Alcohol Friendly", meaning products like Isopropyl Alcohol, can and will penetrated into, soften, wrinkle and/or stain the paint. To avoid any of these problems, a 10% dilution of IPA to water solution is recommended and adequate to remove any compounding and polishing residues without risking any danger to your car's paint or your customer's car's paint.
Another colleague in the industry coined the term Hot to describe strong solutions of Isopropyl Alcohol used to chemically strip paint.
Hot = How fast a liquid will bite into the paint, the strength of the dilution and the flash time for the liquid to evaporate off the finish.
Full strength IPA is a HOT chemical stripper, the stronger the ratio, the hotter it is.
My colleague agrees with my chemist friends that 50%, 70% and 91% dilution levels are all too strong to safely use to chemically strip paint. This person's recommendation was to stay at or below 25% dilution of IPA to water solution.
Sent from my SAMSUNG-SM-G935A using Tapatalk
