Snow-Print Wax
Definition
A spray wax applied in thin coats to snow impressions before casting to provide a thermal barrier, allowing Dental Stone casting without melting the impression.
- Form
- Aerosol spray wax
- Purpose
- Thermal barrier before casting
- Casting medium used with
- Dental Stone
- Application
- Thin coats until surface is opaque
Common questions
Why is a thermal barrier needed before casting a snow impression?+
Dental Stone sets through an exothermic reaction that gives off heat as it cures. Poured directly onto snow, that heat can melt the fine detail of the impression before the stone hardens. The wax coating insulates the snow from the heat of the setting reaction.
How many coats of snow-print wax are typically applied?+
Several thin coats are sprayed from a distance rather than one heavy coat, letting each layer dry before the next. A single thick application can pool, distort ridge detail, or fail to cover the impression evenly.
Can plain plaster be used instead of Dental Stone with snow-print wax?+
Dental Stone is preferred over plaster of Paris for snow work because it is stronger and reproduces finer detail, but the wax barrier step is about protecting the snow from setting heat regardless of which gypsum product is chosen.
Related terms
- Class Characteristics (Footwear)
- The manufactured outsole design features shared by all examples of a specific shoe model: tread pattern, size, shape, and logo placement.
- Dental Stone
- A gypsum-based casting material harder and finer than plaster of Paris. Preferred for forensic 3-D casts because it captures detail at the...
- ESLA (Electrostatic Dust-Print Lifter)
- A device that applies a high-voltage static field to a metallised film, attracting dust particles from a footwear impression on a hard...
- Perpendicular Camera Alignment
- The requirement that the camera lens be directly above the impression centre with the sensor plane parallel to the impression plane; prevents...
- R V. Mohan (1994) + White Burgess Langille Inman (2015)
- Canadian Supreme Court framework for forensic-expert admissibility: Mohan sets relevance + necessity + qualification + no exclusionary rule; White Burgess adds an...
- Randomly Acquired Characteristics (RACs)
- Post-manufacture features (cuts, gouges, embedded material, crack patterns) unique to a specific shoe sole or tyre; the highest-level individualising features in impression...
- SICAR (Shoeprint Image Capture and Retrieval)
- FBI and Foster and Freeman (UK) outsole design database used for class-characteristic database searches; referenced in US, UK, Australian, and Canadian forensic...
- Subclass Characteristics (Footwear)
- Features shared by a subset of shoes from the same mould or production batch; may mimic individual characteristics if not properly distinguished.
- SWGTREAD
- Scientific Working Group for Shoeprint and Tire Tread Evidence; US body that developed the dominant guidelines for footwear and tyre-mark examination, class-subclass-individual...
- Tracking Evidence (TE) Database
- FBI database of tyre tread design patterns, used for class-characteristic identification in tyre-mark cases; accessible to partner agencies internationally.
- Treadmate
- RCMP database of outsole designs for footwear comparison, used by Canadian forensic laboratories and accessible to partner agencies.