Paper Weights Using Basic Size and Basis Weight to Calculate the Weight of Paper Learning Goals

Paper Weights Using basic size and basis weight to calculate the weight of paper Learning Goals

Aer compleng the acvies in this slideshow lecture you should be able to…

1. Deﬁne and idenfy basic sizes of paper

2. Deﬁne and idenfy basis weights of paper

3. Understand how basic size and basis weight are used to calculate paper weights

4. Calculate the number of sheets needed to print a job

5. Calculate the weight of paper for a job based on client specs Basic Size

What is BASIC SIZE?

The basic size of paper refers to the tradional size a parcular type of paper is manufactured in. Coated papers (glossy, dull, san, etc…) have a different basic size than Wring papers (papers used for staonery). All calculaons in regard to a specific type of paper (bond, wring, coated, offset, etc…) are made based on the BASIC SIZE of that parcular type of paper.

Paper can be purchased in many diﬀerent sizes in addion to its BASIC SIZE.

BASIC SIZES vary from one type of paper to another.

“In the U.S. paper industry, measurements of paper density and weight are based on tradional sheet sizes which vary with the type of paper. These standard sheet speciﬁcaons have persisted, even though in many cases sheets of those sizes are no longer manufactured. Paper is described as, say, 24 pound weight if one ream (500 sheets) cut in the basic size would have a mass of 24 pounds.”

Types of Paper

Commercial prinng papers are manufactured at a mill (Sappi, New Page, etc…), sold through a paper company (XPEDEX, Lindenmeyr Munroe, Unisource, etc…) and distributed to prinng companies (Sun Litho, Carr Prinng, Peczuh Prinng, etc…).

Paper comes in many shapes and sizes. It is important to know the following paper types for our class:

ì Coated Papers (dull, gloss, san, etc…)

ì Uncoated Papers (oﬀset, opaque, etc…)

ì Wring & Bond Papers (uncoated papers used for staonery) ì & the diﬀerence between text/book weight paper (paper used for the interior part of a book) and cover weight papers (heavier weight paper used for the exterior of books)

Types of Paper

Please follow the following links to learn more about diﬀerent types of paper. These are mills that manufacture paper.

ì Sappi Fine Paper: hp://www.na.sappi.com/home

ì New Page Paper: hp://www.newpagecorp.com/wps/portal/corporate/home

ì French Paper Company: hp://www.frenchpaper.com

ì Neenah Paper: hp://www.neenahpaper.com

ì Finch Fine Papers: hp://ﬁnchpaper.com

Free Paper Swag

FREE Paper Swag

Paper companies love to give out free stuff. Here are 2 specific places to get free stuff.

Sappi Fine Papers: Go to the ‘Sappi Samples’ link on the boom right-hand corner. You’ll have to register for a free account, but then you’ll be able to add free paper samples and books to a shopping cart. It’s all free including the shipping.

The ‘STANDARDS’ book are amazing. Free Paper Swag

FREE Paper Swag

New Page Papers has a series of educaonal books called the ‘Ed Series’. They are free, but you have to ﬁll out the same form over and over again to get the free books. You can only request one book per form.

New Page Papers: hp://edliveshere.com/ Basic Size

BASIC SIZES OF PAPER

The basic size of paper is set in stone. Every type of paper has its own basic size for calculang paper weight, etc… The easiest way to know what the basic size of a parcular stock is to keep a chart handy. The chart does not change. Everyone in the prinng/graphics/paper industry references the same chart.

We will be concerned with the following basic sizes for this class. See if you can ﬁnd them on the next slide:

1. Book, Text, Oﬀset, Opaque (they all use the same basic size) 2. Bond, Wring (they use the same basic size) 3. Cover

Basic Sizes Standardized Chart

BASIC SIZES OF PAPER What is the basic size for Book, Text, Oﬀset, Opaque stocks?

What is the basic size for Bond, Wring stocks?

What is the basic size for Cover stocks? Basic Sizes Standardized Chart

BASIC SIZES OF PAPER

Write down the following BASIC SIZES. We will be using them in this course. You should memorize them as they will be used over and over again.

1. Book, Text, Oﬀset, Opaque (they all use the same basic size) 25in x 38in 2. Bond, Wring (they use the same basic size) 17in x 22in 3. Cover 20in x 26in Why is the BASIC SIZE of paper important?

Why is the BASIC SIZE of paper important?

When we talk about paper we say it is 20lb bond (copy paper) or 80lb cover, etc… The weight (or basis weight) of the paper (20lb or 80lb) is calculated using the basic size.

The weight of 500 sheets of stock in its basic size = the basis weight.

So, 500 sheets of 17in x 22in 20lb bond (copy paper) weighs 20lbs.

I was able to calculate this because the basic size of bond paper is 17in x 22in (I pulled that informaon from the chart on slide 10) and the basis weight from the problem is listed as 20lb. If we were talking about 17lb bond paper then 500 sheets of 17in x 22in would weight 17lbs.

Pounds can be wrien many ways. It is usually wrien as “#” in prinng but you may also see it spelled out like ‘pounds’ or abbreviated as “lb.” or “lbs.” Basis Weight

What is BASIS WEIGHT?

The basis weight of paper is the weight of 500 sheets of paper in its basic size.

Some people use the basis weight of paper to help idenfy the thickness of paper. Please do not get it confused. Caliper is the exact thickness of paper.

In most circumstances, knowing the basis weight of a stock can help users idenfy a thicker or a thinner stock, but it does not always work this way. For example, 80lb HannoArt Gloss Coated Cover is going to be thinner than 100lb HannoArt Gloss Coated Cover. I know this because I am comparing apples to apples. I’m comparing the exact stock in 2 diﬀerent weights. Identifying Basis Weights

Idenfying Basis Weights

Basis weights are posted in many different locaons in many different ways. Here are just a few places you may find basis weights. Try to idenfy which numbers on the packaging, etc… are the basis weights for that parcular stock. The answers will be on the next slide.

1 Identifying Basis Weights

This is 24# Neenah Environment Wring Stock.

That means that 500 sheets of 17in x 22in stock will weigh 24lbs. (17x22= wring stock basic size)

How much do you think this ream should weigh?

1 Identifying Basis Weights

How much do you think this ream should weigh?

This ream (500 sheets= 1 ream) is 8.5in x 11in.

Four (4) 8.5 x 11 sheets can ﬁt ‘out’ on one 11 x 17. That means this is ¼ of the 17 x 22 basic size of wring stock. So, this ream should weight ¼ of 24lbs, or 6lbs.

1 Identifying Basis Weights

2 Identifying Basis Weights

This is 20# FraserPapers Torchglow Wring Stock.

2 Identifying Basis Weights

3 Identifying Basis Weights

This is 80# Neenah Conservaon Cover.

3 Identifying Basis Weights

4 Identifying Basis Weights

This is a page from a paper swatch book. It lists 2 basis weights that this parcular paper is available in (60# and 70#). The 89gsm and 104gsm is the European way to weigh paper. We use pounds. They use grams per square meter.

4 Paper Weight

The weight of paper is calculated using a very speciﬁc formula. Use the following formula to calculate the weight of paper. This formula requires the user to know the following informaon:

1. How many sheets of paper do you need?

2. What size paper are your purchasing?

3. What is the basic size of the paper you are purchasing?

4. What is the basis weight of the paper you are purchasing?

If you do not know this informaon or are not given this informaon you must calculate it. Paper Weight

Formula for Calculang Paper Weight:

Your paper size # of sheets x x Basis Weight = Total Weight of Basic paper size 500 Paper

This is the only value in the equaon that does not change. It will always be 500. We divide by 500 because the basis weight is the weight of 500 sheets. Paper Weight

Let’s try an example together.

How much does 117,000 sheets of 24in x 36in 80# Gloss Coated Cover weight?

First ﬁnd the answers to the following quesons. Then, move on to the next slide to work through the equaon.

1. How many sheets of paper do you need?

2. What size paper are your purchasing?

3. What is the basic size of the paper you are purchasing?

4. What is the basis weight of the paper you are purchasing?

Paper Weight

Let’s try an example together.

How much does 117,000 sheets of 24in x 36in 80# Gloss Coated Cover weight?

24 x 36 117,000 x x 80# = Total Weight of 20 x 26 500 Paper

ì 24 x 36 is the size of paper we are purchasing

ì 20 x 26 is the basic size of cover stock (see slide 10)

ì 117,000 is the number of sheets

ì 80# is the basis weight of the paper we’re purchasing

Do not round any values unl you have found the ﬁnal answer. Some of the values will be very long decimals. DO NOT ROUND THEM! Round the ﬁnal weight to 2 decimal places. This example is unique. By rounding to 2 decimal places the answer becomes a whole number. Paper Weight

Let’s try an example together.

How much does 117,000 sheets of 24in x 36in 80# Gloss Coated Cover weight?

24 x 36 117,000 x x 80# = Total Weight of 20 x 26 500 Paper

864 x 234 x 80# = Total Weight of 520 Paper

1.66153846 x 234 x 80# = 31,103.9989 or 31,104lbs

Try example # 2 on your own.

How much does 82,500 sheets of 17.5in x 22.5in 70# opaque text weight?

Try example # 2 on your own.

How much does 82,500 sheets of 17.5in x 22.5in 70# opaque text weight?

17.5 x 22.5 82,500 x x 70# = Total Weight of 25 x 38 500 Paper

393.75 x 165 x 70# = Total Weight of 950 Paper

.41447368 x 165 x 70# = 4,787.17008 or 4,787.17lbs

What’s Next? HW: Paper Weights Q1: Paper Weights