Forest Production & Wood Utilization

Detailed analysis of options:

• Apis indica (Apis cerana indica): Indian hive bee, medium-sized, domesticated.
• Apis dorsata: Giant rock bee, the largest honeybee species in India (body length ~20 mm); builds enormous single open combs on tall forest trees and rock cliffs, producing 30-50 kg of honey per colony annually.
• Apis florea: Little bee, smallest honeybee species, yields very little honey.
• Bombyx textor: Wild silkmoth species, not a bee.

Operations in papermaking:

• Beating is the mechanical treatment of pulp fibres to increase fibrillation and bonding strength.
• Sizing: Rosin, soap, wax emulsion, and alum (aluminium sulphate) are chemical additives used during internal sizing of paper to reduce water absorbency and prevent ink feathering.
• Loading is the addition of inorganic fillers (clay, talc, calcium carbonate) to improve opacity and smoothness.
• Colouring involves dyes and pigments added to give paper a specific shade.
  
  Option breakdown:
• Mechanical fiber refining.
• Sizing is the process of adding rosin and alum to impart water resistance.
• Loading uses mineral fillers.
• Colouring uses dyes.

Natural dyes and plant products:

• Henna dye is obtained from leaves of Lawsonia inermis.
• Annatto: The pulpy seed coat of fruits of the lipstick tree (Bixa orellana) yields the valuable orange-red natural carotenoid dye 'Annatto' (containing bixin and norbixin), widely used for coloring butter, cheese, and food products.
• General red dye from wood is derived from Caesalpinia sappan or Pterocarpus santalinus.
• Saffron is obtained from dried stigmas of Crocus sativus.
  
  Option breakdown:
• Obtained from Lawsonia inermis.
• Annatto is specifically extracted from Bixa orellana.
• Broad generic term.
• Obtained from Crocus sativus.