INSERT INTO paper_types (name, weight_gsm, price_per_page_bw, price_per_page_color, description) VALUES
('Standard White', 80, 0.05, 0.25, 'Standard white paper, suitable for most books'),
('Premium White', 100, 0.07, 0.30, 'Premium quality white paper, thicker and more durable'),
('Glossy', 120, 0.09, 0.35, 'Glossy finish paper, ideal for photo books and magazines'),
('Matte', 120, 0.08, 0.32, 'Matte finish paper, reduces glare and enhances readability');