To screen-print your design at home, you will need:  A plain t-shirt 50 ml bottle of degreaser (available at your local art store) 1 liter cold water A large brush 500 ml of emulsion A small bottle of sensitizer A bottle of screen printing ink A squeegee or a coating tray A small wooden stick A hair dryer A transparency A printing screen You can purchase a printing screen at your local art store. Or make your own by buying a mesh screen and a canvas stretcher frame. Stretch the mesh across the frame and staple the edges down so that the mesh is taut. For standard designs on a light shirt, a 110-195 mesh works best. For fine designs with multiple colors, use a 156-230 mesh. Mix the degreaser and the cold water together. Place the brush in the mixture and then brush the mixture on to the screen.  Make sure you brush both sides of the screen. You just want to give the screen a light brush so don’t worry about putting too much of the mixture on the screen. Let the screen dry. Take 20 ml of water and pour it into the bottle of sensitizer. Mix the sensitizer well by shaking for an about a minute.  Add the sensitizer into the emulsion. Use the small wooden stick to mix the sensitizer and the emulsion together. The color of the emulsion should change from blue to green. There should also be small bubbles forming in the emulsion. Place the lid loosely back on the emulsion and place it in a dark area or room for an hour. After an hour, check that all the small bubbles in the emulsion have disappeared. If they do not disappear after an hour, leave the emulsion to sit for another hour until the bubbles are gone. In a very dim room or with a low red light, drip a line of photo emulsion across the screen and use a squeegee to spread it around.  The emulsion will leak through the screen, so be sure to squeegee both sides of the screen.  You can also use a coating tray to apply the emulsion to the screen. Do this by placing the screen on a clean towel and tilting it away from you slightly. Place the coating tray at the...

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Write a summary of the previous text in Vietnamese:
Thu thập vật dụng cần thiết. Chuẩn bị in lụa. Hòa nhũ tương ảnh và chất tăng nhạy. Phết nhũ tương ảnh lên mặt bàn in lụa. Đặt ngược giấy bóng kính xuống bề mặt bàn in. In ảnh lên lớp nhũ tương. Dán băng dính chống nước quanh mép mặt dưới của bàn in. Đặt áo phông lên bề mặt phẳng. Đổ một thìa canh mực in lụa lên bề mặt in. Quét mặt in. Sấy mực. Rửa bàn in của bạn sau khi đã dùng xong.