BS: Math Calculation

Subject: BS: Math Calculation
From: John Hardly
Date: 03 Sep 06 - 04:07 PM

I have the following glaze already dry mixed. I don't need it anymore.

EPK 2500g
Feldspar 5270g
Whiting 2130g
Talc 400
Red Iron 600
Bone Ash 400

I do need the following glaze which contains all the same chemicals but in different amounts (plus one extra chemical)

EPK 2500g
Feldspar 5270g
Whiting 2130g
Talc 400g
Red Iron 400g
Bone Ash 300g
Rutile 400g

What would I have to add to the first (already mixed) batch to convert it into a batch of the second?

Subject: RE: BS: Math Calculation
From: Peace
Date: 03 Sep 06 - 04:20 PM

Are the relative proportions essential to the glaze?

Subject: RE: BS: Math Calculation
From: Peace
Date: 03 Sep 06 - 04:23 PM

If you are willing to double the batch, it's easy.

Subject: RE: BS: Math Calculation
From: Bee-dubya-ell
Date: 03 Sep 06 - 04:39 PM

Add the following:

EPK 1250g
Feldspar 2635g
Whiting 1065g
Talc 200g
Red Iron 0g
Bone Ash 50g
Rutile 600g


Or, just dip the stuff in the original recipe and spray a rutile wash over it.

Subject: RE: BS: Math Calculation
From: John Hardly
Date: 03 Sep 06 - 04:51 PM

Thanks Bruce, yer a peach!

Subject: RE: BS: Math Calculation
From: Dave the Gnome
Date: 03 Sep 06 - 07:11 PM

John, you realy need to get a set formula for this. You asked a very similar question four years ago.

Mean to tell me you can't remember that far back? Probably working with too many chemicals...

:D

Subject: RE: BS: Math Calculation
From: John Hardly
Date: 03 Sep 06 - 07:41 PM

It's so much more fun to take advantage of this folk-math forum.

Actually, it's just the same case as the last one -- just a safeguard since I work alone -- someone to double-check my math. The upside is saving $50 worth of chemicals, the downside would be lotsa bad pots if I got it wrong.

Subject: RE: BS: Math Calculation
From: Nigel Parsons
Date: 03 Sep 06 - 08:41 PM

It's Hardly a difficult calculation.

(snigger snigger)

CHEERS
Nigel

Subject: RE: BS: Math Calculation
From: Amos
Date: 03 Sep 06 - 10:18 PM

Have                               Desire                              Change
EPK 2500g                        EPK 2500g                         0
Feldspar 5270g                Feldspar 5270g                         0
Whiting 2130g                  Whiting 2130g                         0
Talc 400                           Talc 400g                               0
Red Iron 600                     Red Iron 400g                        add 200
Bone Ash 400                   Bone Ash 300g                        subtract 100
Rutile       0                      Rutile 400g                            add 400

Getting 25% of the bone ash OUT is left as a problem for the student to figger...


A

Subject: RE: BS: Math Calculation
From: Amos
Date: 04 Sep 06 - 02:01 AM

...or double the lot and adjust the additives accoridngly relative to the existing proportion of each.

A

Subject: RE: BS: Math Calculation
From: Liz the Squeak
Date: 04 Sep 06 - 04:30 AM

This isn't maths, it's chemistry (or baking, not a lot of difference except you don't get to eat the results in chemistry)!

LTS

Subject: RE: BS: Math Calculation
From: Geoff the Duck
Date: 04 Sep 06 - 03:02 PM

I do...
Quack!
GtD.

Subject: RE: BS: Math Calculation
From: Liz the Squeak
Date: 04 Sep 06 - 03:21 PM

That explains a lot Geoff!!

LTS

Subject: RE: BS: Math Calculation
From: Bert
Date: 04 Sep 06 - 03:42 PM

Hi, you say ...I have the following glaze already dry mixed. I don't need it anymore...

The quantities that you must add would depend on whether you used any of the original batch. If so, you must weigh it first before you do your sums.

Subject: RE: BS: Math Calculation
From: leeneia
Date: 05 Sep 06 - 10:31 AM

"Getting 25% of the bone ash OUT is left as a problem for the student to figger..."

I know the answer to that one. It was in one of my favorite childhood folktales. You get a little magic doll (left to you by your dead mother), you give it a little beer and bread, and it summons a horde of ants and commands them to remove the proper number of tiny grains. Easy.

Subject: RE: BS: Math Calculation
From: SINSULL
Date: 05 Sep 06 - 10:53 AM

Is this a recipe for an explosive device?