The addition of a variety of additives to a soluble electroluminescent polymer in solution is used to improve the printability and performance of screen printed light-emitting polymer-based devices. The methods entail making microneedles by precision machining techniques and micromold structures from plastic materials. The debris opening may be on the receptacle or in the lid of the vacuum cleaner. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The second bonding coating is pressed to permeate into said pre-cracks and is applied between the new and old cement structural surfaces; after the surface-covering grout layer is applied on the second bonding coating and then becomes smoothed and hardened to shrink and produce pre-cracks, its outer surface is coated with a protective coating which can be colored for beautification. The Timing oriented simulator is fast and accurate for only timing netlists with Rs, but cannot compute gradients efficiently.