初心者の鋳込み タンブラー Slip casting for pottery beginner
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- Опубликовано: 23 май 2019
- 陶芸でやって見たい鋳込み。一体型の石膏型を作って鋳込みをやります。原形、石膏型、泥漿、そして鋳込み。乾燥した後、皮一枚程度の削りをして完成。 このビデオは、この内の鋳込み編です。石膏型としては、もっとも簡単な一体型の作品です。
Pottery Slip casting. Pottery lovers want to try it out someday.
This video shows how to do the slip casting with a beer tumbler.
The slip casting is very simple if you know the basic. Making a plaster casting and how to prepare the slip are some what diff 
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Thank you for this wonderful video!
Nice, now I understand how it becomes hallow.
Hi, thank you for this video. What is a ‘tocchin’ please?
I like it! Is the slip made with clay and water only? This is so creamy! Thank you.
Hi! Cristina
Thank you for your access. You can make slip with cray or porcelain.
You have to add some sodium silicate into the slip. How much sodium silicate you add?
I usually add 2 to 3 small table spoon of sodium silicate as a simple method.
Pro method.
If you want to make slip with 10kg of porcelain and let say it contains 25% of water in it.
10kg x 75%=7.5 kg =dry porcelain. 0.3% of dry porcelain (With cray 0.5%) is the amount of sodium silicate you add to porcelain slip. 7.5kg x 0.003=22.5g
1. Make golf ball size of porcelain with 10kg of porcelain.
2. Put porcelain balls into a bucket and put water. Make sure, water cover all balls.
3. Leave it overnight.(about 12 hours)
4. Discard the clean water and then add 22.5g of sodium silicate.
5. Mix it well with a hand held mixer. The slip if ready for the casting.
@@normantomita thank you for the details
@@normantomita thank you very much! Is it the same percentage (75%) when using grès ceramic?
@@normantomita you are amazing
thank you for this video, We know that porcelain is the best type of clay to make pottery, can we make it with other types of clay? THANKS
Yes you can make slip with other clay and use them for casting. Times for casting will be usually longer than the porcelain slip. Good luck!
Que mezcla es ?????
Can you do video how to make slip please step by step
Yes I'll make one. Please wait.
余分粘土をとるには竹ヘラの方がいいんですか？
遅くなりました。
竹べらの方が良いです。その理由は、弾力性があり、鉄製のものよりも型の石膏を削ったりして傷をつける事が少ないからです。竹は優れもので、切り出しナイフや鋸さえあれば、簡単にいろんな形状や厚みのへらが作れます。大事なポイントは竹の皮を使う事で、皮の硬さを活かす。滑り易いし、耐久性が上がります。
私たちは、轆轤で作陶するときのトンボはもちろん、陶芸用針を使って口を切りそろえる代わりに、竹で道具を作ります。作り方は、鋳込みの場合は、薄く。トンボのホルダーと切り道具の場合は少し厚く作ります。分かり難いですね。鋳込み用は１～２㎜、トンボのホルダーは３ミリ位のイメージで作って下さい。先端は三角にナイフで削って大まかな形状を作ります。仕上げは鉄ヤスリで。刃は、皮と反対側（竹の内側）に付けます。
ありがとうございますm(_ _)m
大変参考になりました。
ところで、鋳込んだ後、高台部分を内側からみたとき凹むことは無いでしょうか？
返事が遅くなりました。
鋳込みの性質上、均一な厚みになります。ですから、高台を付けるとその部分はへこみます。それを防ぐには、石膏型を圧力鋳込みにするのが本来のやり方でしょう。でも、圧力鋳込みの石膏型はやり方を覚えないといけないし、結構手間がかかりますので、こんな方法は如何でしょう。 高台を付けない。そして、少し鋳込みの時間を掛け、厚みを取り、削りで高台を作る。私のタンブラーなどはこの方法です。鋳込んだものの削りはしますか？ 窯元では、鋳込みでも削りはします。一皮剥く感じの削りです。この方が作品は綺麗に仕上がります。どうせ削りの作業をするのであれば、高台は削り出しにしましょう。
もう一つの方法は、泥漿を流し出した後、間を置かず、高台側を下にして型にとんとんと衝撃を加えてへこみに、残ったでしょうを流し込むようにします。私の同僚はこの方法を取ってます。完全にへこみが埋まるかどうかは、泥漿の硬さや、高台の形などで違ってくると思いますので、やって見て試すしかありません。
Where can we get the moulds. can we make them or purchase the set?
In the case of Japan, there are many companies which make or sell mold. I'm sure you can find them in your county too. I enjoy making my own plaster mold. I suggest you make your own if baked plaster are available. Start with a simple one, such as shot tumbler etc., Enjoy!
@@normantomita 😊thankyou
what is a "tocchin" and how do you make one? Is the spelling correct? Cannot find it on goggle or RUclips...
Hi! Luella
It is a Japanese word. I don't know English word for it. Maybe, it isn't available in other countries. It made of plaster. I think you can make it with plaster. Make a flat round plaster about 20mm thick and then trim it. You can find the shape of "tocchin" in my video. Example at 5.41 in playback time. Thank you.
How can make this pottery slip?
You can make slip with cray or porcelain.
You have to add some sodium silicate into the slip. How much sodium silicate you add?
I usually add 2 to 3 small tablespoon of sodium silicate as a simple method.
Pro method:
If you want to make slip with 10kg of porcelain and let say it contains 25% of water in it.
10kg x 75%=7.5 kg =dry porcelain. 0.3% of dry porcelain (With cray 0.5%) is the amount of sodium silicate you add to porcelain slip. 7.5kg x 0.003=22.5g
1. Make golf ball size of porcelain with 10kg of porcelain.
2. Put porcelain balls into a bucket and put water. Make sure, water cover all balls.
3. Leave it overnight.(about 12 hours)
4. Discard the clean water and then add 22.5g of sodium silicate.
5. Mix it well with a hand held mixer. Now slip is ready for the casting.
What are the materials used for casting?
I'm not sure what your question is.
If your question is about slip. I’ll give you about general ideas as follow:
As for the soil use porcelain. Of course, clay can also be used. Dissolve porcelain with water and add sodium silicate to it. The sodium silicate (Water glass) adds 0.3% to the dry weight of porcelain soil. If it is clay, add 0.5%. Stir well with an electric hand mixer. Example:
Condition: 10kg of the porcelain. The water content 25% Dry weight 7.5Kg. The sodium silicate is diluted 5 times with water.
Procedure:
Step 1. Make a golf ball size of porcelain with all porcelain and put into a bucket.
Step 2. Pore water to the top of porcelain balls and leave the overnight.
Step 3. The next day, drain the top water. Now you have fluffy porcelain.
Step 4. Add the sodium silicate. Roughly add 2-3 teaspoons of it.
Stem 5. Stir well with a hand mixer if you have. Now the slip is ready.
how you make slip?
Hi!
Make a porcelain slip first. Then add sodium silicate into slip. Mixed it well.
Amount of sodium silicate (It may differs by respective manufucturer)
Roughly, you add 2 to 3 table spoons of sodium silicate into the slip which are made with 10kg of porcelain (as example. )
How to make a slip:
Make a lot of porcelain balls (golf ball size) with a block of porcelain. Put all balls into a bucket and add water up to the top of balls. Leave if over night and dump excess water. Mix them well with a hand mixer (You may need a pro hand mixer). Or leave them untill porcelain balls melt.
@@normantomita Do you fire them in a kiln? Do you recommend using premade slip? If so what brand?
How did you mix the slip, what is the recipe?
Hi!
Thank you for your access. You can make slip with cray or porcelain.
You have to add some sodium silicate into the slip. How much sodium silicate you add?
I usually add 2 to 3 small table spoon of sodium silicate as a simple method.
Pro method.
If you want to make slip with 10kg of porcelain and let say it contains 25% of water in it.
10kg x 75%=7.5 kg =dry porcelain. 0.3% of dry porcelain (With cray 0.5%) is the amount of sodium silicate you add to porcelain slip. 7.5kg x 0.003=22.5g
1. Make golf ball size of porcelain with 10kg of porcelain.
2. Put porcelain balls into a bucket and put water. Make sure, water cover all balls.
3. Leave it overnight.(about 12 hours)
4. Discard the clean water and then add 22.5g of sodium silicate.
5. Mix it well with a hand held mixer. The slip if ready for the casting.
@@normantomita thanks so much for this explanations, it as help a lot . 🙏
Ohh
Japanese pottery is of low quality.
Not all of them. It's just me. There are so many talented ones. I'm a beginner in terms of slip casting skill. Be nice and have a nice day!