Complex sentence: These resins were used to impregnate paper and cotton fabric which were cured under pressure and high temperature to produce laminates, in later years this manufacturing method included the use of fiberglass fabric, other resin types were also used.
Split into simpler sentences: These resins were used to impregnate paper and cotton fabric which were cured under pressure and high temperature to produce laminates. In later years this manufacturing method included the use of fiberglass fabric, other resin types were also used.