What Is Split-Grade Printing?
Split-grade printing is a technique for variable-contrast (VC) papers where the print receives two separate exposures: one through a low-contrast filter (grade 0 or 00) and one through a high-contrast filter (grade 4 or 5). By controlling the duration of each exposure independently, you gain far more precise control over highlights and shadows than any single-grade exposure can provide.
The Principle
Variable-contrast papers contain two emulsion layers:
- A low-contrast, blue-sensitive layer that responds to the grade 0/00 filter (yellow light)
- A high-contrast, green-sensitive layer that responds to the grade 4/5 filter (magenta light)
When you expose at a single intermediate grade, both layers receive exposure proportionally. With split-grade printing, you expose each layer independently, giving you separate control over highlight tonality (low-contrast exposure) and shadow separation (high-contrast exposure).
Basic Procedure
Step 1: Low-Contrast Exposure (Highlights)
- Insert the grade 0 (or 00) filter
- Make a test strip to find the exposure that produces the best highlight tonality -- the brightest important tones should show subtle detail and separation
- Note this time
Step 2: High-Contrast Exposure (Shadows)
- Without moving the paper, switch to the grade 5 filter
- Make a test strip (on a fresh sheet) at the grade 0 time you chose, then vary the grade 5 exposure
- Find the grade 5 time that produces the best shadow density and separation
- Note this time
Step 3: Final Print
- Expose at your chosen grade 0 time
- Switch filters (do not move the paper or easel)
- Expose at your chosen grade 5 time
- Develop, stop, fix, and wash normally
Why It Works Better Than Single-Grade
With a single grade, adjusting exposure to fix highlights ruins shadows, and vice versa. Split-grade gives you two independent controls:
- Need more highlight detail? Increase grade 0 exposure without affecting deep shadows.
- Need richer blacks? Increase grade 5 exposure without washing out highlights.
- Local adjustments: You can dodge and burn during either exposure, targeting specific tonal ranges.
Advanced Techniques
- Burning with specific grades: Burn highlight areas with additional grade 0 exposure, or deepen shadow areas with additional grade 5 exposure. This is impossible with single-grade printing.
- Fine-tuning: After establishing base times, make small adjustments to either exposure to fine-tune the balance.
- Difficult negatives: Negatives that seem unprintable at any single grade often yield excellent prints with split-grade technique.
Tips
- Many printers start with grade 5 first, then grade 0. The order does not matter -- the paper responds to total exposure at each filtration regardless of sequence.
- Keep a notebook of your split-grade times for different negative types. Patterns emerge quickly.
- Split-grade printing is faster than it sounds. After initial testing, you can go straight to final prints with confidence.