Tagboard, Chipboard, Index Bristol

[AdmiralDonSnider]

As an amateur I found that you often have to take what is available, not what you would like to have. While I managed to find some grades of index bristol (with wrongly denoted grammatures by the way) I always look into clueless eyes when asking for tagboard or even thin chipboard.

 

My question is if these materials are interchangable for use in insert components (pupadelles, timed reports)? I figure that you either want a liner or something that makes a solid wall, depending on the device. Since these three materials are quite similar in many aspects, I hope one could replace something unavailable with something available.

 

Any ideas or experiences?

[NightHawkInLight]

My experience has been that any kraft paper will work just fine for all applications in canister shells. If it is thin and flimsy, make your tubes with a few more turns. I've even made inserts out of printer paper and every one has worked just fine.

 

I once at the last minute decided to throw in some 1.5" shells as inserts that I made to be fired individually. They only had three turns of printer paper and exposed spiking. I never thought they would survive - every one did.

 

I have used the cardboard boxes that cereal and soda cans come in to make my actual canisters, but never for the inserts. It's not necessary.

[Mumbles]

Tagboard and index bristol are more or less the same it seems. Chipboard is supposed to be inferior in terms of strength, but honestly if I am using "proper" materials, it's all I've ever used. I've more or less stopped using any of those three and use posterboard or manilla file folder paper depending on the application. I do occasionally use bristol if I am making end disks however.

 

When you say that the grammage is incorrect do you mean that it doesn't match the kraft paper grammage? They are measured in different ways. If not, I wonder if with the different methods for determining basis weights invented in the Imperial system, exact replicas didn't get transcribed into metric. Below is my list of imperial grades and their thickness in inches for a wide variety of stuff. Taking a caliper with you might be the best way to find suitable liner material.

 

Common Thicknesses

30# 0.003

35# 0.0035

40# 0.004

50# 0.005

60# 0.006

70# 0.007

4 ply poster 0.017

5 ply poster 0.022

6 ply poster 0.026

8 ply poster 0.034

14 ply poster 0.048

Cereal Boxes 0.025

Paper Lunch Sack 0.003

Grocery Bag 0.006

10pt file folder 0.01

12pt file folder 0.012

14pt file folder 0.014

100lb Tagboard 0.007 From fulcanelli

90lb Index Bristol 0.007 From fulcanelli

125lb Tagboard 0.009 From fulcanelli

110lb Index Bristol 0.009 From fulcanelli

Chipboards

Based on # of sheets per ~50lbs, sometimes given in pt

#120? #125? 0.018

#90 0.022

#70 0.03

#60 0.035

#50 0.042

#45 0.052

#30 0.07

#20 0.1

[Goofy]

Great resource Mum! Thanks, I just happen to be on the hunt for some linerboard. Somebody mentioned 12pt and a printshop recycle bin. Will "going green" affect the stars color? Ha!

 

 

[AdmiralDonSnider]

Thanks for the lines and the list.

 

The grammage written on the bristol was 615g in one case. 615 grams per sq m must be a mistake. Even thick cardboard isn´t that heavy. I know the lb system of chip and bristol is different from kraft.

 

I re-read the chapters on insert shells and think bristol will work well. I will try it and come back. In the meantime there are some things left to get a hold of, such as 5" case formers and mortars. Wooden rollers with one handle cut off served well for smaller shells, but now I guess I´ll have to abuse something new.

[AdmiralDonSnider]

Yesterday I tried to roll one timed salute (1 3/4") and realized how thick you actually want the chipboard wall. My bristol turned out to be way too thin, as I needed about 3 times the lenght suggested by Fulcanelli.

 

Is it a problem when the chip wall is made up from more than one strip?

 

Any ideas where to get the mentioned 0,030" chipboard??

[Peret]

Is it a problem when the chip wall is made up from more than one strip?

No problem - a lot of the literature, Weingart etc, suggests using more than one strip to roll stouter cases. Lay several sheets together with about three diameters between the first and last edges, and sand them down until there are no steps. That becomes the inside. If you don't feather the inside edges you can't ram a reliable end plug without leaks.

 

.03 chipboard seems to be used as the supporting backing sheet of many notepads.

[AdmiralDonSnider]

The insert report made with multiple bristol strips worked flawlessly. For a pic see my gallery.

[dagabu]

 

Any ideas where to get the mentioned 0,030" chipboard??

 

I get chipboard from ULINE here in the USA. I can get it locally but it comes to the same price and I have to drive 30 miles to pick it up. As far as multiple pieces go, no, it makes no difference, just make sure that you begin the next strip where the last one ends so you don't get an air pocket.

 

I have even heard of pyros sanding the edges of chipboard so that they can get an overlap with no bump. Stack up 24 sheets, taper the pile, use a sanding block and taper the whole stack.

[AdmiralDonSnider]

I´ll have a look for a similar shop, thanks!

 

I figured the chip has to be quite flexible even in thicker calipers, otherwise it won´t lay itself smoothly around a former as thin as 1 3/8".

 

The method of connecting the chip bands is the same as with kraft strips used for canister shell cases.

 

The performance of these small insert salutes really scared me. I didn´t expect such a boom with only "one-dimensional" confinement; but for flash that´s enough I guess. They´d make a great rocket header also...