adult
black background
caucasian ethnicity
chemical
chemistry
closeup
clothing
dark
environment
equipment
flame
focus on foreground
glove
heat
holding
human hand
ice
industry
isolated
laboratory
liquid
looking
males
material
men
nature
night
occupation
one person
outdoors
physical structure
pollution
portrait
protective glove
research
science
scientific experiment
scientist
smoke
snow
steam
studio shot
technology
temperature
wet
winter
women
working
young adult