I had a very bad experience with the Pentel R.S.V.P. Moonz ballpoint that I reviewed a month or so ago.  The ink had a problem clumping up, and in those areas where it did, it bled through to the back of the page.  I was taken back by that last bit, and Pentel of America respon
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R.S.V.P.® RT Ballpoint Pen, Medium Point – Pentel of America, Ltd.
Pentel R.S.V.P. Ballpoint Pen, 0.7mm Fine Tip, Pink Ink, Box of 12 (bk90-p)
pen reviews – Page 20 – Pens and Junk
Pentel R.S.V.P. Super RT Retractable Ballpoint Pen, 1mm, Black Ink/Barrel, Dozen
Pentel RSVP RT Retractable Ballpoint Pen, (1.0mm) Black Ink 12pk
pen reviews – Page 20 – Pens and Junk
Pentel R.S.V.P. Ballpoint Pen, 0.7mm Fine Tip, Sky Blue Ink, Box of 12 (BK90-S) : Ballpoint Stick Pens : Office Products
Pentel® R.S.V.P.® Ballpoint Pens, Fine Point, 0.7 mm, Clear Barrel, Black Ink, Pack Of 12 : Ballpoint Stick Pens : Office Products
This retractable pen is designed for extended periods of use. The exclusive Comfort Zone, latex-free grip is designed to reduce writing fatigue.
Pentel RSVP RT Pastel Barrel, Retractable Ballpoint Pen, (1.0mm) Med, Assorted Ink (6-Pk)
Pentel R.S.V.P. Ballpoint Pen
Pentel® R.S.V.P.® Ballpoint Pens, Fine Point, 0.7 mm, Clear Barrel, Black Ink, Pack Of 12 : Ballpoint Stick Pens : Office Products
Pentel R.S.V.P. RT Colors New Retractable Ballpoint Pen, Medium Line, Assorted Ink Colors, Pack of 8 (BK93CRBP8M) : Ballpoint Stick Pens : Office Products