You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is To ensure high quality direct gold restorations, which of the following conditions should be satisfied? and explain in detail?
High-quality direct-gold restorations can be ensured only when four principal conditions are satisfied: 

The appropriate gold form is used for each specific clinical situation.
The material is used only where it is indicated.
A perfectly dry and clean field is provided.
The material is properly manipulated with the correct instruments. Obviously, these conditions can be satisfied only if the clinician has acquired the necessary knowledge, skills and experience.

Ref:Phillip’s Science of Dental Materials ed 12 pg 414