The more white card, the lighter the resulting slide. Adjust fogging time and overall exposure to vary slide density and contrast. Fix for three minutes, wash 20 minutes, dry and mount. Kodalith emulsion side up. Stop, fix, and wash as for negatives.
Biggest problems are dust and scratches.
Project results to evaluate quality and most desirable line width. Among the correct exposures, line size is the only thing that will vary. Projecting the slide is required to evaluate its suitability. Filter before use and store in dark to prolong life. Continue to immerse until paper has turned brown.