During the process of my time in school Art class clay making, I’ve observed that clay goes through five stages. I created a clay plate that clearly displays these five stages.
Stage I - Greenware
Greenware is the stage where the clay is soft, carvable and moldable. This is where you can make the shape you want and stick external pieces of clay to it.
In my case, I carved out a disk from a slab of clay. I then smoothed it out with the kidney (a clay smoothing tool) and stretched the clay. I got the shape it wanted and then cut out two clay coils for the bottom of my plate. The single coil wasn’t long enough so I used a technique called scoring and slipping and connected the two coils together.
Scoring and slipping is a technique where you use the clay cutting tool make scratches on where you want to join the two pieces (as shown above) and using some water as a ‘clay glue’ (or clay slip) you press the pieces together and massage it with the kidney to create a larger piece or extension of your original piece of clay.
This is all part of the Greenware process.
Next, I put the clay on our cake spinner and connected the coil with the clay disk I made earlier. I adjusted it and used the kidney to smooth out the underside of the plate.
I was almost done. I removed the plate and moulded the edges of the clay to form a lip.
This marks the end of the Greenware process, where the clay is moldable, shapeable and attachable.
Stage II - Leather Hard
After the clay has dried for around a day, you’ve reached the Leather Hard stage. This is where there is still moisture inside the clay but hard enough for you to start a bit of sgraffito. The clay turns a light grey colour and you are unable to attach external pieces.
I wasn’t here for the Leather Hard stage, but one prediction I could make was that our plate took a bit longer to dry because we added too much water during the Greenware stage. The Leather Hard stage is dependent on the air humidity and the amount of water inside the clay.
Stage III - Bone Dry
Bone Dry clay is the stage where the water has completely dried and is where sgraffito carving the clay is most optimal. It is now an almost white colour and a dusty feeling when you touch it. In this stage, the clay is still prone to cracking though. This stage is a very important stage as it has to be Bone Dry before it gets fired otherwise the moisture inside will cause the clay to explode.
For my Bone Dry experience, I had to carve the pattern I wanted on the plate. But first I had to paint them a white glaze over it to make the pattern show through. After you’ve carved the pattern you want, you have to start the first round of firing the clay.
Stage IV - Bisqueware
After firing the clay for one day, you have reached the Bisqueware stage were the clay is a very off-white colour. The clay is much lighter than it was before any of the previous stages and is very porous, almost like Chinese nougat candy. Bisqueware is basically the stage where the clay piece has been only fired once and is ready for the final stage.
Stage V - Glazeware
Glazeware is the final stage. This is where you have painted (AKA Glazed) and fired the clay once. Firing the clay one more time will complete your project!
Postscript
I don't have a photo of the finished plate because I accidentally dropped the plate!
在我上学的艺术类粘土制作过程中，我观察到粘土经历了五个阶段。我创造了一个清晰显示这五个阶段的粘土板。
第一阶段 - 绿色软件
绿色软件是粘土柔软，可梳理和可塑造的阶段。在这里，您可以制作出您想要的形状，并将外部粘土粘在上面。
就我而言，我用一块粘土雕刻出一个圆盘。然后我用肾脏（粘土平滑工具）将其弄平并拉伸粘土。我得到了它想要的形状，然后为我的盘底切出两个粘土线圈。单线圈不够长所以我使用了一种称为刻痕和滑动的技术，并将两个线圈连接在一起。
评分和滑动是一种技术，您可以使用粘土切割工具在您想要连接两个部件（如上所示）的地方划一个划痕，并使用一些水作为'粘土胶'（或粘土滑动）将部件压在一起用肾按摩它可以创造出更大的一块或延伸原始的粘土。
这是Greenware流程的一部分。
接下来，我将粘土放在我们的蛋糕旋转器上，并将线圈与我之前制作的粘土盘连接起来。我调整了它并用肾脏平滑了盘子的下面。
我差不多完成了。我取下了盘子并模塑了粘土的边缘以形成唇缘。这标志着绿色工艺的结束，粘土是可塑造的，可塑造的和可附着的。第二阶段 - 皮革坚硬粘土干燥了大约一天后，你已经达到皮革硬质阶段。这是粘土内部仍然有水分的地方，但是足够难以开始一点五彩缤纷。粘土变成浅灰色，你无法附加外部碎片。我不是在皮革硬盘阶段，但我可以做的一个预测是我们的盘子需要更长时间才能干燥，因为我们在Greenware阶段添加了太多的水。皮革硬质阶段取决于空气湿度和粘土内的水量。第三阶段 - 骨干骨干燥粘土是水完全干燥的阶段，也是雕刻粘土的sgraffito最佳的地方。当你触摸它时，它现在几乎是白色和尘土飞扬的感觉。在这个阶段，粘土仍然容易开裂。这个阶段是一个非常重要的阶段，因为在它被射击之前它必须是骨干，否则里面的水分将导致粘土爆炸。对于我的骨干经验，我不得不在盘子上雕刻我想要的图案。但首先我不得不在它上面涂上一层白釉，以使图案显示出来。在你雕刻出你想要的图案之后，你必须开始第一轮发射粘土。第四阶段 - 餐具在烧制粘土一天后，你已经到达了Bisqueware阶段，粘土是一种非常灰白色的颜色。粘土比之前的任何阶段都要轻得多，并且非常多孔，几乎像中国牛轧糖糖果。 Bisqueware基本上是粘土片只被射击一次并准备好进入最后阶段的阶段。第五阶段 - Glazeware Glazeware是最后阶段。这是你画过的地方（AKA Glazed）并且曾经用过一次粘土。再次射击粘土将完成您的项目！
后记我没有成品板的照片，因为我不小心掉了盘子
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