PARAMETER RESPONSIVE QUALITY INDICATORS HAVING SHELF-STABLE SUB-ASSEMBLIES

A multiplicity of heat responsive quality indicator (HRQI) assemblies, for use in a quality management system for products, each having a plurality of indicator states operative to provide an indication of quality of a product with which the indicator is associated, each HRQI assembly including a shelf-stable, non-heat responsive quality indicator (NHRQI) sub-assembly including at least one coloring material diffuser and at least one indicator template and at least one heat responsive coloring material (HRCM) which is flowable at a temperature exceeding an upper temperature threshold, and which, when injected into the NHRQI sub-assembly, converts the NHRQI sub-assembly to the HRQI assembly, which is responsive to changes in temperature over time in exceedance of the upper temperature threshold, for changing an appearance of the HRQI assembly.