Measuring paper weight

[loveforvdubs]

Hey all,

I'm not a printer myself, other than some silk screening. But I manage a supply chain that does a fair amount of printing for our company. From time to time I want to verify the paper weight of the finished product, or find out what weight our competitor is using. What method is used to measure paper weight?

 

[ziggy33]

Micrometer then convert your findings into grams per meter squared then look at a chart it will tell you how many gm2 is 80# text and so forth just some simple math!! Gotta love math!!

 

[loveforvdubs]

Great! Thanks for the help!

 

[rolandman]

Micrometer then convert your findings into grams per meter squared then look at a chart it will tell you how many gm2 is 80# text and so forth just some simple math!! Gotta love math!!

The thickness of a Sheet has no correlation the the GSM of the paper. 100 gsm from one mill would most likely not be the same thickness as from the next mill. If you want to know the weight of a sheet you need to weigh a sqmetre.

 

[Taymour]

CUT SAMPLE OF 100mm x 100mm take weight... this isthe most simple procedure.

 

[Adil]

Cut a 10 cm² piece of cardboard then measure it using a very precise digital gold scale. So you can know the grammage per cm²

 

[Raf77]

Can't believe what tricks you guys make
It's so simple - let's take 150 gsm paper. If one square meter weights 150 grams, then one square centimeter weights 150/10000=0,015 gram.

One A3 sheet has 1247.4 cm2, so it weights 1247.4 X 0.015 = 18.711 grams.

Or there is another method:
One A3 sheet is 0.12474 m2, so 150 (gsm) X 0.12474 = 18.711 grams.

Bingo! Don't need to cut and weigh anything

 

[Adil]

Hi Raf
the calculation that you proposed is reversed, that means you have assumed that you know the weight of the put square however in reality in the graphic chain if I give you different size for example coated paper 500mm×700 bible paper 27.9×34mm paper to write 450mm × 350 gray back cardboard 450mm × 650 and I ask you what weight it is, you must proceed with the method that I proposed and that Mr Taymour also cited, and we use a precision balance because we have need a tolerance to the hundredth

 

[Raf77]

Yes you're right, but the question was how to verify paper weight on finished product. So I assumed that if I'm ordering let's say A5 flyers on 130gsm, then I know the weight what product should have.

And this method is actually working both ways. If you don't know what paper weight was used, you need to weight finished product, measure dimensions and calculate same way.

 

[Adil]

He tol that from time to time he want to verify paper weight , the verification is like what i describ

 

[Raf77]

He tol that from time to time he want to verify paper weight , the verification is like what i describ

Ok, Mr Knowbetter
I'll stick to my method anyway