high-speed videos - blood on ice & snow

These videos are supplemental for our observational study on how passive drip stains form on snow and ice. This research was a collaboration between our research group and Toronto Police Service Forensic Identification Services. 

To cite this collection of videos for your purposes please use the following: Stotesbury T, Albrecht A, Wyard L, Boyd P. High-speed videos of passive drip stains formed on snow and ice. 23 Feb 2019. https://bit.ly/3lohNQ0. 

For further information about our study and video collection please request here.

A passive drip stain forming on ice.

This is an example of a passive drip stain that has formed on ice (crust). The droplet is made using bovine blood with 12.5% v/v acid citrate dextrose (ACD-A) anticoagulant . Passive drip stains were created using a Pasteur pipette, droplets were allowed to form and fall perpendicular to the surface at a height of 90 cm.

A passive drip stain forming on powdered snow.

This is an example of a passive drip stain that has formed on powdered snow. The droplet is made using bovine blood with 12.5% v/v acid citrate dextrose (ACD-A) anticoagulant . Passive drip stains were created using a Pasteur pipette, droplets were allowed to form and fall perpendicular to the surface at a height of 90 cm.

A passive drip stain forming on new snow.

This is an example of a passive drip stain that has formed on new snow. The droplet is made using bovine blood with 12.5% v/v acid citrate dextrose (ACD-A) anticoagulant . Passive drip stains were created using a Pasteur pipette, droplets were allowed to form and fall perpendicular to the surface at a height of 90 cm.

A passive drip stain forming on mixed terrain.

This is an example of a passive drip stain that has formed on mixed terrain. The droplet is made using bovine blood with 12.5% v/v acid citrate dextrose (ACD-A) anticoagulant . Passive drip stains were created using a Pasteur pipette, droplets were allowed to form and fall perpendicular to the surface at a height of 90 cm.

© Copyright Theresa Stotesbury 2020