I used the old Viradon for a while. Yes it stinks to high heaven.
It tones quite quickly when using Agfa's dilutions but when diluted 1:100 exhibits the following characteristics. These results were obtained using Ilford MG Warm Tone.
- 30 Seconds - no colour change in the highlights or mid tones but a hint of plummy brown in the shadows
- 45 Seconds - still no change in highlights or mid tones but stronger colour shift in the shadows
- 60 Seconds - very defiite colour change in the shadows and subtle changes in the mid tones. Hightlights still unchanged
- 90 Seconds - shadows now strongly toned and mid tones show marked colour shift.