This section deals with materials that are not usually associated with one specific activity. For example, sculpture or experimental three-dimensional work may involve a considerable range of materials which may be duplicated in different activities. The most obvious danger is in the unorthodox or 'creative' use of processes and materials which, in other circumstances, may be prescribed by 'named' activities such as modelling, welding, casting, and so on.
In any use of sheet materials including, paper, plastic films, dress and upholstery fabrics, etc. they may burn rapidly if accidentally ignited by a naked flame and the fumes and smoke produced, particularly from synthetic materials, may likely cause an additional hazard.
CLEAPSS guidance - MRAT - 101 - Flammable materials