Small aliquots (currently 0.2 cm 3 ) of each mixture were dispensed into specially designed and manufactured vacuum-formed transparent PET trays (Fig. ). The PET is chosen and tested to ensure that no catalyst or filler residues are left when it is subsequently burnt away. Other polymers including biodegradable plant-based materials could be substituted provided that they can be vacuum formed and also leave no measurable inorganic residue after combustion (e.g., ). Moulds to make the trays were generated by 3D printing using eSun High Temperature resin [] on a Creality LD-002H printer. Tray width is limited by the need to fit them into a laboratory isopress (see below). The initial tray design held 12 wells, each approximately 10 mm in diameter and holding 0.2 cm 3 of suspension. Further development is in hand to reduce the well size and thereby increase the number of samples per tray. The trays were held on custom 3D printed holders to locate them in the Eppendorf unit, mimicking part of the layout of a standard 96-well plate. These holders also facilitate subsequent handling. Multiple arrays of compositions can easily be generated for processing under various conditions. For example, in Fig. one set of compositions is being dispensed into four trays for calcination at different temperatures. The same approach can be used to address variations in other process parameters such as compaction pressure, calcination time, calcination atmosphere. From this point on the samples are always handled as sets -there is no one by one handling of individual sample discs.