Mixing primer. The container says 1:3 (more water than primer).
Instinctively, I interpret it as 1 part primer and 3 parts water (25% in the final mixture).
However, when I think about it and google, it seems this isn't obvious (and apparently a generational issue among chemists...) as many believe it describes the final concentration, i.e., in the mixed bucket, it should be 33% primer, or 1/3.
According to that method, it should be 1 part primer and 2 parts water.
So what is, for example, 1:1? Pure primer or half water?
Juice boxes seem to have figured this out and write 1+4 instead
Instinctively, I interpret it as 1 part primer and 3 parts water (25% in the final mixture).
However, when I think about it and google, it seems this isn't obvious (and apparently a generational issue among chemists...) as many believe it describes the final concentration, i.e., in the mixed bucket, it should be 33% primer, or 1/3.
According to that method, it should be 1 part primer and 2 parts water.
So what is, for example, 1:1? Pure primer or half water?
Juice boxes seem to have figured this out and write 1+4 instead
I had interpreted it as 1+2 as you suggested, since 1:3 is one third, i.e., one third concentrate in the final mixture.
1:1 is what you have in the bottle with concentrate, i.e., 100% concentrate.
1:1 is what you have in the bottle with concentrate, i.e., 100% concentrate.
Kan själv!
· Trelleborg
· 18 398 posts
I interpret it as one part primer to three parts water.
I would like to say that it is a common way to describe mixing ratio.
If it were 1/3, it would mean you have to recalculate, which is inconvenient.
I would like to say that it is a common way to describe mixing ratio.
If it were 1/3, it would mean you have to recalculate, which is inconvenient.
My experience from the chemical lab world:
1:3 on a chemical product indicates the dilution ratio, i.e., 1 part (unit) of the first is combined with 3 parts of the other to give a total of 4 parts final mixture. In other words, the juice manufacturers' 1 + 3 is another way to write the same thing.
The other variant you're discussing is the dilution factor (in the final mixture). For the product with a dilution ratio given as 1:3, it would be indicated as 25% or 4X dilution.
1:3 on a chemical product indicates the dilution ratio, i.e., 1 part (unit) of the first is combined with 3 parts of the other to give a total of 4 parts final mixture. In other words, the juice manufacturers' 1 + 3 is another way to write the same thing.
The other variant you're discussing is the dilution factor (in the final mixture). For the product with a dilution ratio given as 1:3, it would be indicated as 25% or 4X dilution.
Yes, 1+3 certainly means that, anything else becomes tricky with the risk of miscalculation. I don't understand why they don't just write it like that.
I found this link:
http://www.tnc.se/termfraga/spadning/
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Question: How should one write when diluting acids so that it is unambiguous? Does “1 : 3” mean that you take one part of one thing and three parts of the other, or that you take 1/3 and 2/3?
Answer: This is a tricky problem where opinions differ among chemists, especially depending on the generation – where older chemists often interpret it as 1 dl + 2 dl, younger ones usually prefer to interpret it as 1 dl + 3 dl. It is important to be extra clear here, and therefore TNC recommends that one writes dilution with a plus sign rather than a colon, e.g., “1 + 3”.
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I found this link:
http://www.tnc.se/termfraga/spadning/
"
Question: How should one write when diluting acids so that it is unambiguous? Does “1 : 3” mean that you take one part of one thing and three parts of the other, or that you take 1/3 and 2/3?
Answer: This is a tricky problem where opinions differ among chemists, especially depending on the generation – where older chemists often interpret it as 1 dl + 2 dl, younger ones usually prefer to interpret it as 1 dl + 3 dl. It is important to be extra clear here, and therefore TNC recommends that one writes dilution with a plus sign rather than a colon, e.g., “1 + 3”.
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