C and T line

Anyone has any idea why the T line is darker than C line? Supposedly C will be darker right?

C and T line
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Tulis jawapan

C line = control line. T line = test line. Kalau t line lebih pekat drpd control line upt tu valid je. So positive if double line is seen. Upt invalid kalau control line tak naik langsung. Nak lagi tepat buat upt guna urine awal pagi.