1. before every Saturdays starting to be talked about chemical risks and dangers (in this section the user interaction task cards, said there is no harmful chemicals, but should put the protection device).
Step 1. Before you start, you may need to ask a potential chemical hazards and always (in this topic. The reaction was informed that the card works. No harmful chemicals, but should put protection).
Step 1. Before starting work every time asking the risk of chemicals and dangerous always (in this topic, the reform task card informed. There is no danger to chemicals, but should wear protective equipment).